Game Introduction – Infected: The Twin Vaccine

Welcome to the Infected: The Twin Vaccine walkthrough on Gamezebo. Infected: The Twin Vaccine is a hidden object/adventure game created by Goggi Games. This walkthrough includes tips and tricks, helpful hints, and a strategy guide on how to complete Infected: The Twin Vaccine.

 

How to Use this Walkthrough

  • This walkthrough is meant to be used as a guide to assist in solving mini-puzzles and acquiring all items in order to complete the game. You may explore locations in the order you wish, this walkthrough is written to take the most direct route to the game’s finish.
  • Inventory objects will be written in bold. The walkthrough will state, “Use the inventory item on the blah blah,” because it assumes you have the item. If you don’t have the item, on your keyboard, press CTRL+F (at the same time). In the text box, type the name of the item you are looking for and press ENTER. This will scan this page for the appearance of that word.
  • Play the tutorial! It will explain gameplay elements. The tutorial is available in Casual mode only.
  • Often you need to perform an action (i.e., place or collect an inventory item) in order for the game to progress. Before assuming the game has a glitch, go through your inventory and see if you can place any of your items anywhere or look for an item to pick up, switch to flip, etc.

Gameplay and Tips

  • This is a hidden object adventure game. You will move from location to location solving hidden object hunts, mini-puzzles and picking up items to use in order to proceed in the game.
  • The Menu button at the bottom left of the screen gives access to the options screen and can bring you back to the main menu.
  • The difficulty settings can be customized. Select whether or not you want to play the tutorial and if you want help text. You can also set the timing for the refilling of the hint meter or to skip mini-puzzles. You can also set how often glints (sparkles) appear on interactive areas (move the slider all the way to the right to turn glints off).
  • Move your cursor over every aspect of a scene and watch for it to change, it’s the only way to find everything, especially if playing without glints (sparkles).
  • Items collected throughout the game go into your inventory, located at the bottom of your screen.
  • Your journal is located in the bottom left corner. The journal records important information and contains clues to help solve puzzles.
  • The map can be found in the journal.
  • Hidden object scenes provide a list of items to find. The items written in white are immediately available. When you find an item written in white, it will go into the Items tab. Use these items to find the items written in yellow. When you have found everything from the list, an item will be added to your inventory. In this walkthrough, the inventory item will be indicated by a yellow highlight and all the other items to find will be indicated by white highlights.
  • Closing a window – To close the zoom-in windows, click Close. Tip: If you can zoom in on the area again, you likely haven’t found everything you needed to find.
  • Mini-puzzles can be skipped once the Skip button fills. The Skip button is located at the bottom right of the puzzle window.
  • Hints are available in the bottom right of the screen.
  • Hints used in the hidden object scenes highlight an item.
  • Hints used during the adventure mode will point out an interactive area or inventory item in the scene, or it will point you in the direction to go.
  • There are no achievements.

Morrisey Ranch

  • To start the game, enter your name, then customize your difficulty settings.
  • If offered, play the tutorial. Even if you are a veteran player of these games, it can explain helpful game elements.

 The Twin Vaccine

  • Take the picture, then take the phone cord and map. Click on the phone jack. Plug in the phone cord, then answer the ringing phone.
  • Watch the cutscene.

 The Twin Vaccine

  • Talk to the man.
  • Take the crowbar. Click on the wheels on the train on the right. Take the wrench and the coin. Click on the train emblem. Use the wrench to remove the bolts, then take the train emblem, then take the tractor key.
  • Click on the window on the left train. Pry open the window with the crowbar and take the valve wheel.
  • Click on the wheel on the left train where the steam is coming out. Add the valve wheel, then turn the wheel to make the steam stop.
  • Move forward to Morrisey Ranch, then go left towards the barn.

 The Twin Vaccine

  • Pick up the phone. Click on the three video messages. Click anywhere outside the window to close it.
  • Take the shovel.
  • Move down.

 The Twin Vaccine

  • Talk to the man. Watch the cutscene.
  • Click on the tree swing. Take the faucet handle and the coin.
  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the mailbox flag. Go right towards the tractor yard.

 The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the 3 button.
  • Click on the tractor. Insert the tractor key.
    • Click on the door to start a hidden object hunt.

 The Twin Vaccine

  • Find all the objects written in white. Once you have found all the items written in white, click on the Items tab.

 The Twin Vaccine

  • Click on the tractor and cut the cloth with the knife to take the window latch. Put the ladder rungs on the ladder, then add the window latch to the window (A) to take the parking sign. Put the parking sign on the inset (B) and take the sledgehammer from the open panel. Use the sledgehammer on the loose ground (C) and take the door key. Use the drill on the X, then catch the oil with the oil dropper. Put the door handle on the door, then use the oil dropper on it, then unlock the door with the door key.
  • Take the garden hose.

 The Twin Vaccine

  • Click on the fence. Add the train emblem. A mini-puzzle starts. Rotate the rings to complete the designs. See the solution in the screenshot above.

 The Twin Vaccine

  • Take the flashlight. Return to the barn.

 The Twin Vaccine

  • Click on the faucet. Add the faucet handle and the garden hose. Turn the handle.
  • Pick up the hose nozzle. A mini-puzzle starts. Place the hose nozzle over the hornets’ nest and click and hold until the green meter is empty.
  • When you are finished, move left.

 The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the baseball and the coin.
  • Click on the mailbox. Add the mailbox flag. Lift the flag. Read the note, then click anywhere outside the window to close it. Take the letter P.
  • Throw the baseball at the window, then pick up the baseball and throw it at the window again.
  • Enter the barn.

 The Twin Vaccine

  • Watch the cutscene. Click on the area below the open window. Take the plastic jar.
    • Click on the area on the right to start a hidden object hunt.

 The Twin Vaccine

  • Find all the objects written in white.

 The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Click on the window (A). Use the letter opener on the envelope, then take the magnifying glass. Use the hammer to remove the nails from the board, then use the saw on the boards. Put the torch rope on the torch (B), then pour gasoline on it, then use the magnifying glass, then take the lit torch. Add the heart gem on the jewelry box (C), then take the gun latch. Put the gun latch on the rifle (D), then take the screwdriver. Click on the panel (E) and remove the screws with the screwdriver, then take the metal clippers. Click on the chained up box (F). Use the metal clippers on the chain, then use the lit torch to melt the symbols. Take the licence plate.
  • Return to the front of the barn.

 The Twin Vaccine

  • Click on the hornets’ nest. Use the plastic jar to take the hornet sample.
  • Return to the tractor yard, go through the fence to the truck.

 The Twin Vaccine

  • Put the licence plate on the truck. Take the bunker key.
  • Return to the side of the barn.

 The Twin Vaccine

  • Click on the bunker door. Unlock it with the bunker key. Go down into the bunker.

 The Twin Vaccine

  • Use the flashlight to find the electric panel. Click on the electrical panel, then remove the cover. A mini-puzzle starts. Guide the spark down to the bottom hole while avoiding the rotating squares. The spark can move one spot up, down, left, right and diagonally into an empty spot only. There are several ways to solve this puzzle. Below is one way.

 The Twin Vaccine

 

 The Twin Vaccine

 

 The Twin Vaccine

 

 The Twin Vaccine

  • Click on the body. Read the note in the body’s hand, then click anywhere outside the window to close it. Scroll through the pictures on the digital camera, then click anywhere outside the window to close it.
  • Click on the table to start a hidden object hunt.

 The Twin Vaccine

  • Find all the objects written in white.

 The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Give the cheese to the mouse (A) and take the wheel. Click on the shelf (B) and use the can opener to open the can to take the blue fuse. Uncork the bottle with the corkscrew and take the red fuse. Put the light bulb in the lantern (C) and take the drawer handle. Put the drawer handle on the metal cabinet (D). open the cabinet and take the extension cord. Plug in the extension cord (E), then use the duct tape to fix it (F). Put the wheel and then the fan belt on the generator (G). Click on the side of the generator (H). Add the red and blue fuses, then press the power button. Take the power emblem.
  • Return to the front of the Morrisey Ranch.

 The Twin Vaccine

  • Click on the electrical panel. Add the power emblem. Open the panel, then pull the lever.
  • Move forward to the downtown area.

Downtown

 The Twin Vaccine

  • Watch the cutscene.
  • Talk to the man. Watch the cutscene. Move up the street, then go further up the street.

 The Twin Vaccine

  • Take the stained glass and the coin.
  • Move down two scenes, then go towards the vending machine.

 The Twin Vaccine

  • Put the 3 button on the panel, then put four coins in the coin slot. Press 35 on the panel and the chips are added to your inventory. Move down one scene.

 The Twin Vaccine

  • Give the chips to the man. He tells you the combination to the pawn shop, either 7417 or 7147.
  • Move up the street, then go left to the pawn shop.

 The Twin Vaccine

  • Click on the poster. Take the car photo. Click on the door handle. Enter the code 7417, then 7147.
    • Click on the tractor to start a hidden object hunt.

 The Twin Vaccine

  • Find all the objects written in white.

 The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Place the ladder (A), then take the video cables. Insert the fluorescent bulb (B). Take the cassette tape (C). Click on the child’s desk (D). Use the blowtorch on the picture, then put out the fire with the fire extinguisher and take the channel knob. Click on the tv (E). Put the VCR on top of the tv, then add the video cables, place the channel knob and put the cassette tape in the VCR. Watch the video. When the tape pops out, click on the tape to get the hair pin. Click on the cracked wall (F). Smash the wall with the pickaxe, then click on the hole in the wall. Use the hair pin to open the box and take the nail puller. Use the nail puller to open the crate (G). Look inside the crate and take the crossbow.
  • Move down.

 The Twin Vaccine

  • Click on the shop window on the right.

 The Twin Vaccine

  • Find 12 pieces of the power bill.
  • A mini-puzzle starts. Put the power bill together.
  • Solution:

 The Twin Vaccine

  • Go down the alley.

 The Twin Vaccine

  • Click on the meter. Read, then remove the note. Add the power bill. A mini-puzzle starts. Adjust the dials to match the numbers on the power bill. Each dial moves itself and the dial to its right. To solve the puzzle, move the first dial to the number 2 position, then move right and position each dial to its proper number.
  • When you are finished, take the ladder pole that falls.
  • Move down two scenes.

 The Twin Vaccine

  • Click on the electrical pole. Add the ladder pole, then take the letter T.
  • Move up the street.

 The Twin Vaccine

  • Click on the theatre sign. Add the letters T and P. Take the gate key that falls to the ground.
  • Go right, into the alley.

 The Twin Vaccine

  • Click on the gate. Unlock it with the gate key. Watch the cutscene.

Aunt Jane’s Apartment

 The Twin Vaccine

  • Click on the upper window to see Theresa. Click on the dumpster. Take the stained glass and the plunger.
  • Move left.

 The Twin Vaccine

  • Note the writing on the wall. Use the crossbow on the window, then click on the broken window. Take the freezer key.
  • Click on the freezer. Unlock it with the freezer key. Take the basketball.
  • Move down.

 The Twin Vaccine

  • Throw the basketball in the net. Move left.

 The Twin Vaccine

  • Click on the freezer. Take the 7 button and the light bulb. Move down.

 The Twin Vaccine

  • Click on the door. Add the light bulb to the socket above the door, then flip the light switch. Note the combination 236926. Click anywhere outside the window to close it. Move left.

 The Twin Vaccine

  • Use the crossbow on the crate. Click on the suitcase. Enter the combination you saw on the door (236926). Take the stained glass and the coin. Move down.

 The Twin Vaccine

  • Click on the door. Add the three stained glass pieces. Enter the apartment.

 The Twin Vaccine

  • Take the coin and the mirror piece. Click on the bulletin board. Take the spade key and Jane’s ID card (added to journal). Click anywhere outside the window to close it. Click on the open door. Take the car photo. Click anywhere outside the window to close it.
    • Move left to start a hidden object hunt.

 The Twin Vaccine

  • Find all the objects written in white.

 The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Throw the dart at the dartboard (A), then take the note paper. Click on the watch (B). Add the note paper to set the time, then take the battery. Put the battery on the flashlight (C). Take the flashlight, then use it to light the dark cupboard (D). Take the open button. Put the open button on the microwave (E), then place the ice cube tray inside the microwave. When the microwave opens again, take the water (melted ice cubes in tray). Pour the flower seeds in the pot (F), then add the water. Take the key. Unlock the cabinet (G) with the key. Take the glue. Put the glue on the broken teacup, then click on it to fix the teacup. Hang the four teacups on the hooks and when the shelf breaks, take the car keys.
  • Go up the stairs (from the right hallway).

 The Twin Vaccine

  • Take the mirror piece. Click on the doll. Take the coin and the car photo. Click anywhere outside the window to close it.
  • Move up.

 The Twin Vaccine

  • Take the coin and the mirror piece. Go into the washroom.

 The Twin Vaccine

  • Take the car photo. Click on the toilet. Use the plunger, then click anywhere outside the window to close it. Flush the toilet.
  • Leave the washroom, then go right into the bedroom.

 The Twin Vaccine

  • Take the mirror piece. Pick up the phone and watch the video text. Click anywhere outside the window to close it.
  • Click on the wall photo. Take the mirror piece. Click anywhere outside the window to close it.
  • Click on the left window. Take the mirror piece and the coin. Click on the right window. Take the car photo.
  • Move down to the landing.

 The Twin Vaccine

  • Click on the wall mirror. Add the six mirror pieces. A mini-puzzle starts. Put the mirror back together. The solution is in the screenshot above.
  • Move down two scenes to the first floor.

 The Twin Vaccine

  • Click on the open door. Take the shower handle. Click anywhere outside the window to close it.
  • Click on the bulletin board. Add the five car photos and the car keys. A mini-puzzle starts. Match the keys to their respective cars. Matches are numbers, symbols and colours.
  • Solution:

 The Twin Vaccine

  • A car starter is added to your inventory.
  • Move down.

 The Twin Vaccine

  • Use the car starter on the car. Go through the car.

 The Twin Vaccine

  • Take the step ladder. Click on the area under the stairs to start a hidden object hunt.

 The Twin Vaccine

  • Find 12 rooster emblem pieces. A rooster emblem is added to your inventory.
  • Move down, then move left.

 The Twin Vaccine

  • Click on the right door. Add the rooster emblem. Take the shears.
  • Move down, then go through the car.

 The Twin Vaccine

  • Click on the left stairs. Use the shears to cut the rope. Rope is added to your inventory. Take the wood planks.
  • Click on the right stairs. Add the wooden planks. Go up the stairs.

 The Twin Vaccine

  • The crossbow is your cursor. Shoot the three windows two times each to break the glass. Once the glass is broken on the left and middle window, shoot the latches at the top to knock the items down. Once this is done, move down.

 

  • Click on the cellar door. Take the grappling hook and the hammer and chisel. Click anywhere outside the window to close it.
  • Go up the right stairs.

 The Twin Vaccine

  • Use the grappling hook on the window beside the door. Enter the room.

 The Twin Vaccine

  • Take the notebook (added to your journal) and the coin. Click on the microscope.
  • Add the hornet sample. Pick up the syringe (A) and use it on the hornet, then use the syringe on the slide (B). Put the slide on the microscope (C). A mini-puzzle starts. Put the rotating molecules in the empty slots on the board. Molecules must touch at least one matching colour. Look at two empty slots to determine the two colours needed. Then find a rotating molecule with those two colours. Click on the molecule and note the angle at which it stops. If it doesn’t stop at the angle you need, find another molecule with the same two colours. When you’ve stopped the correct molecule colours, move it to the empty slots and click to release.
  • Solution:

 The Twin Vaccine

  • The gene pattern is added to your inventory.

 The Twin Vaccine

  • Click on the panel on the right wall. Add the gene pattern. A mini-puzzle starts. Recreate the gene pattern. Click on a coloured block, then click on the slots to turn them the selected colour. Match the gene pattern. The solution is in the screenshot above.
  • Take the heart key.
  • Move down three scenes, enter the apartment and go up the stairs (from the right hallway) and continue up the stairs to the landing.

 The Twin Vaccine

  • Place the stepladder on the floor. Click on the pipe and take the tweezers. Enter the bathroom.

 The Twin Vaccine

  • Click on the shower faucet. Add the shower handle. Watch the cutscene.
  • Take the paint scraper from the bathtub. Move down to the landing.

 The Twin Vaccine

  • Use the crossbow on the soft spot on the wall. Go back into the bathroom.
  • Click on the broken tiles and take the red gem.
  • Move down, then enter the bedroom.

 The Twin Vaccine

  • Click on the wall photo. Use the tweezers in the top left corner and peel back the photo. Take the club key.
  • Move down to the landing. If you haven’t already, fix the mirror (see further above). Move down to first floor.

 The Twin Vaccine

  • Click on the open door. Wait for the diamond key to float to within reach, then take the diamond key.
  • Move up the stairs.

 The Twin Vaccine

  • Click on the doll. Add the red gem. Click on the wall to where the light beam is pointing. Use the paint scraper to remove the paint (four clicks). Use the diamond key in the diamond shape, the club key in the club shape, the spade key in the spade shape and the heart key in the heart shape. Take the tile piece.
  • Move down two scenes, then go through the car.

 The Twin Vaccine

  • Click on the cellar door. Add the tile piece. A mini-puzzle starts. Rearrange the tiles to complete the picture. Click two tiles to swap their positions. When a tile is properly positioned, it will light up and be locked into place. The solution is in the screenshot above.
  • Take the fire hose.
  • Move down three scenes.

 The Twin Vaccine

  • Click on the writing on the wall. Use the hammer and chisel on the wall. Take the big wrench.
  • Move down, then move up the street.

 The Twin Vaccine

  • Click on the hydrant. Add the fire hose, then tighten it with the big wrench. A mini-puzzle starts. Your cursor is the hose nozzle. Click and hold the left mouse button and place the nozzle over one of the three burning areas. Continue to click and hold until the green meter empties. If the green meter isn’t moving, correct the nozzle position so the stream of water is flowing onto a fire. Put out all the three fires.

 The Twin Vaccine

  • When you have put out the fires, move the car door, then move down to go under the bridge (move your mouse to the left side of the scene and wait for the down arrow).

 The Twin Vaccine

  • Talk to the man. Click on the ground beside the man. Take the driver’s licence (added to journal), the coin and the manhole X.
  • Move down, then move up the bridge.

 The Twin Vaccine

  • Take the coin. Click on the grate. Take the tackle box key. Click on the downed lamppost. Take the manhole R.
  • Move down.

 The Twin Vaccine

  • Click on the car. Use the tackle box key on the tackle box. Take the fish hook.
  • Move down.

 The Twin Vaccine

  • Click on the manhole cover. Add the manhole X and the manhole R to spell Oxford. Remove the manhole cover and take the fishing rod.
  • Move down and go right to the vending machine.

 The Twin Vaccine

  • Add the 7 button. Insert eight coins into the coin slot, then press 17 to get the bird seed.
  • Move down, then move up two scenes, then move down to go under the bridge.

 The Twin Vaccine

  • Talk to the man. Use the fishing rod on the lake. Add the fish hook to the pop-up window. A mini-puzzle starts. Lower the hook to catch and raise the boot. Click and drag the mouse and rotate it to lower the hook, then reverse the direction to lift the boot. Do not let the hook or boot touch a fish. It is ok if a fish swims over the line. A boot is added to your inventory.
  • Give the boot to the man. In return, he gives you a lantern (unlit).
  • Move down two scenes, then go right and go straight through the alley.

 The Twin Vaccine

  • Use the lantern (unlit) on the fiery stairs to get the lantern (lit).
  • Move down two scenes, then go forward two scenes.
  • Watch the cutscene.

Simpson Park

 The Twin Vaccine

  • Use the lantern anywhere on the scene. Throw the bird seed at the birds. Click on the bench to start a hidden object hunt.

 The Twin Vaccine

  • Find all the objects written in white.

 The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Put the cuckoo bird on the clock (A) and take the staple remover. Click on the toolbox (B). Remove the bolts with the wrench, then open the toolbox. Cut open the wrapped item using the scissors, then take the knife. Use the knife on the pumpkin (C) and take the chess piece. Click on the glove (D). Remove the staples with the staple remover, then take the glove. Use the glove on the barbed wire (E) and take the chess piece. Put the crow feather on the hat (F), then take the chess piece. Use the rake on the leaves (G), then take the hatchet. Use the hatchet on the log (H), then take the chess piece. Put the four chess pieces on the chess board (I), then take the key. Use the key on the padlock on the bucket (J). Take the bucket.
  • Move toward the bridge (at right).

Infected: The Twin Vaccine

  • Click on the rock in the creek. Use the bucket on the water to get the bucket of water. Click anywhere outside the window to close it. Pour the bucket of water on the bridge to put out the fire. Cross the bridge.

Infected: The Twin Vaccine

  • Click on the barrel. Take the lasso.
  • Move left.

Infected: The Twin Vaccine

  • Click on the shovel in the water. Use the lasso to take the shovel.
  • Move down three scenes.

Infected: The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the glass jar.
  • Move towards the bridge.

Infected: The Twin Vaccine

  • Click on the rock in the creek. Use the shovel on the rock, then take the boat piece.
  • Move forward, then move left.

Infected: The Twin Vaccine

  • Click on the tree on the left. Use the jar to get the jar of insects.
  • Move down two scenes.

 

  • Click on the tree on the right. Use the jar of insects on the tree, then take the jar. Use the jar to get the tree sap.
  • Cross the bridge.

 

  • Click on the beehive. Use the jar of sap on the tree, then take the glass breaker.
  • Move right.

Infected: The Twin Vaccine

  • Click on the helicopter. Smash the windshield with the glass breaker, then take the floodlight.
  • Move down.

Infected: The Twin Vaccine

  • Click on the floodlight. Add the floodlight. Click on the gazebo to start a hidden object hunt.

Infected: The Twin Vaccine

  • Find all the objects written in white.

Infected: The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Put the saw blade on the skill saw (A), then take the skill saw. Click on the X on the floorboards (B). Use the skill saw, then take the wolf head. Click on the board on the right (C). Add the wolf head and the eagle head. Take Neptune. Use the magnet on the hole in the floor (D) to take Mercury. Click on the board on the left (E) and add the Earth, Neptune, Saturn, moon and star. Take the school key.
  • Move right.

Oxford Elementary School

Infected: The Twin Vaccine

  • Click on the school door. Insert the school key. Enter the school.
  • Watch the cutscene. Go through the door on the left to the hallway.

Infected: The Twin Vaccine

  • Take the yearbook (added to journal). Click on the fire alarm. Take the head diagram.
  • Go through the left door into the music room.

Infected: The Twin Vaccine

  • Take the boat piece. Click on the desk and take the dynamite. Click on the music staff lines. Take the stomach diagram.
  • Move down into the hallway, then go through the right door into the science room.

Infected: The Twin Vaccine

  • Take the note off the board (added to journal), then take the water bottle. Click on the diagram. Add the head diagram and the stomach diagram. Watch the cutscene. Take the lighter and coin.
  • Move down two scenes to the main hallway.

Infected: The Twin Vaccine

  • Put the dynamite on the rubble blocking the door at the end of the hall, then light the dynamite using the lighter. Watch the cutscene. Take the doorknob that appears on the floor.
  • Go through the door on the left into the hallway, then go right into the science room.

Infected: The Twin Vaccine

  • Click on the door. Add the doorknob. Click on the door to start a hidden object hunt.

Infected: The Twin Vaccine

  • Find all the objects written in white.

Infected: The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Use the can opener on the can (A), then take the open soup can. Put the window handle on the window (B), then take the chisel. Use the chisel on the broken brick (C), then add the hammer, take the box cutter. Use the box cutter on the box (D) and take the pot cover. Click on the outlet (E) and add the red and blue wires. Put the pot on the element (F), then pour in the open soup can and place the pot lid. Take the hot soup. Pour the hot soup on the ice (G), then take the fire alarm.
  • Move down to the hallway.

Infected: The Twin Vaccine

  • Click on the bucket. Add the water bottle, then take the boat piece.
  • Click on the fire alarm. Add the fire alarm, then pull it.
  • Move down. Watch the cutscene. Move forward.

Infected: The Twin Vaccine

  • Click on the wall photo. Take the screwdriver.
  • Move down.
  • Click on the grate. Use the screwdriver (four clicks), then take the hammer and coin.
  • Move forward.

Infected: The Twin Vaccine

  • Click on the desk. Take the coin. Use the hammer to remove the nails (four clicks), then take the boat piece.
  • Move forward.

Infected: The Twin Vaccine

  • Take the coin.
  • Move down two scenes, then go left into the hallway.

Infected: The Twin Vaccine

  • Click on the arcade game. Add four coins. Take the power room keys.
  • Return to the power room (move down, then move forward two scenes).

Infected: The Twin Vaccine

  • Click on the door. Insert the power room keys. Click on the door. Take the photo piece. Click anywhere outside the window to close it.
  • Move down.
  • Click on the wall photo (see inset in screenshot above). Add the photo piece. Note the name “Marty.” Click anywhere outside the window to close it. Move forward.

Infected: The Twin Vaccine

  • Click on the door. Use the arrows to adjust the password so it reads MARTY. 
  • Move down two scenes, then go right into the theatre.

Infected: The Twin Vaccine

  • Talk to Theresa. The film reel is added to your inventory. Watch the cutscene. Click on the film projector. Add the film reel. Watch the cutscene. Talk to Theresa’s father. The school emblem is added to your inventory.
  • Move down two scenes (leave the school).

Infected: The Twin Vaccine

  • Watch the cutscene. Click on the helicopter. Watch the cutscene. Click on the sign. Add the school emblem. Take the boat piece.
  • Move down then go left.

Infected: The Twin Vaccine

  • Click on the boat. Add the five boat pieces. Click on the boat to put it in the water. Move towards the house.

Theresa’s House

Infected: The Twin Vaccine

  • Talk to Theresa’s father. Take the coin and axehead. Click on the far right window. Take the coin and axe.
  • Click on the door. Break the boards with the axe (four clicks). Click on the door to start a hidden object hunt.

Infected: The Twin Vaccine

  • Find all the objects written in white.

Infected: The Twin Vaccine

  • Once you have found all the items written in white, click on the Items tab. Click on the family crest. Add all the inventory items to the crest. Take the family crest.

Infected: The Twin Vaccine

  • Click on the gate. Add the family crest. Walk through the gate.

Infected: The Twin Vaccine

  • Click on the car on the left. Take the coin and the ladder. Move forward.

Infected: The Twin Vaccine

  • Take the coin and the truck keys. Click on the Theresa’s father. Watch the cutscene. Move down. Watch the cutscene.
  • Move down two scenes.

Infected: The Twin Vaccine

  • Put the ladder on the left side of the house. Click on the top window. Take the coin and the rubber gloves.
  • Move forward.

Infected: The Twin Vaccine

  • Click on the car on the left. Use the rubber gloves to remove the vine and take the vacuum.
  • Click on the truck on the right. Unlock the door with the truck keys. Use the vacuum on the soot. Take the coin and the glove box key. Use the glove box key to open the glove box, take the coin.
  • Move forward, then go right, then forward, then move left towards the barn.

Infected: The Twin Vaccine

  • Take the coin.
  • Move left, then go down the cellar.

Infected: The Twin Vaccine

  • Take the coin. Click on the dead man. Click on the wallet. Take the coin and the key card.
  • Move down four scenes. Watch the cutscene.

Infected: The Twin Vaccine

  • Take the coin. Move down.

Infected: The Twin Vaccine

  • Click on the tollbooth. Insert 12 coins.
  • Click on the booth. Put the key card on the numeric pad on the left. Try to enter the booth. Watch the cutscene. Get on the train. Watch the cutscene.

The end!

If you are playing the Collector’s Edition, you can now continue to play the bonus chapter. To play the bonus chapter, from the main menu, click Extras, then click Bonus Chapter.

Bonus Chapter

Infected: The Twin Vaccine

  • Take the crowbar. Click on the car at the right (A). Use the crowbar to lift the hood, then take the car battery. Click on the second car from the right (B). Take the tire iron. Click anywhere outside the window to close it.
  • Click on the car in the middle (C). Use the crowbar to take the headlight.
  • Click on the car at the far left (D). Use the tire iron to take the wheel.

Infected: The Twin Vaccine

  • Click on the second car on the right (B). Add the car battery, headlight and wheel.
  • Get in the car. Take the gas mask. Watch the cutscene.

Infected: The Twin Vaccine

  • Take Theresa’s doll (keepsake 1/18). Click on the right window. Smash the window with the crowbar. Take the Tiffany emblem.
  • Click on the door. Use the crowbar to break the boards (four clicks). Enter the house.

Infected: The Twin Vaccine

  • Click on the lower steps. Take the gate ring. Use the crowbar on the boards blocking the kitchen at the left. Enter the kitchen.

Infected: The Twin Vaccine

  • Take the shovel. Click on the fridge. Take the Michael emblem. Click on the left counter. Take the white fuse and father’s glasses (keepsake 2/18).
  • Move down two scenes.

Infected: The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the Theresa emblem.
  • Click on the gate. Add the Michael emblem, Theresa emblem and the Tiffany emblem. Go through the gate.

Infected: The Twin Vaccine

  • Take the twin bears (keepsake 3/18). Click on the left car. Take the fire extinguisher.
  • Move right.

Infected: The Twin Vaccine

  • Click on the bench. Take the yellow fuse and the pacifier (keepsake 4/18).
  • Click on the statue. Take the truck keys. Click anywhere outside the window to close it.
  • Click on the gravestone at the right to start a hidden object hunt.

Infected: The Twin Vaccine

  • Find 12 daisies. Watch the cutscene. A letter X is added to your inventory.
  • Move down.

Infected: The Twin Vaccine

  • Click on the truck. Unlock the door with the truck keys. Take the purple fuse and the baby bottle (keepsake 5/18).
  • Move down and enter the house.

Infected: The Twin Vaccine

  • Use the fire extinguisher to put out the fire on the stairs and on the desk. Click on the desk. Take the wedding photo (keepsake 6/18). Watch the cutscene. Click on the desk again and take the blue fuse.
  • Go upstairs.

Infected: The Twin Vaccine

  • Take Tiffany’s bib (keepsake 7/18). Use the crowbar on the loose wall. Take the gate ring and the red fuse. Click on the fuse box. Add the red, purple, blue, green and yellow fuses. A mini-puzzle starts. Match the fuse to its matching coloured wire. The solution is in the screenshot above.
  • Use the crowbar to smash the attic door. Open the door. Click on the door to start a hidden object hunt.

Infected: The Twin Vaccine

  • Find all the objects written in white. A stone hand is added to your inventory.
  • Move down three scenes, then go forward through the gate and go right.

Infected: The Twin Vaccine

  • Click on the statue. Add the statue hand. When the panel opens, take the metal clippers.
  • Move down two scenes, enter the house and go left into the kitchen.

Infected: The Twin Vaccine

  • Click on the fridge. Cut the chain with the metal clippers. Take the letter A.
  • Move down two scenes, then go forward through the gate.

Infected: The Twin Vaccine

  • Click on the gate. Add the letters A and X. Go through the gate.

Infected: The Twin Vaccine

  • Watch the cutscene. Click on the left train’s window. Smash the window with the crowbar and take the gate ring. Click on the left train’s door. Take the gate ring. Click on the right train’s wheels. Take Theresa’s shoes (keepsake 8/18).
  • Move forward.

Infected: The Twin Vaccine

  • Watch the cutscene. Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the gate ring and piggy bank (keepsake 9/18).
  • Click on the tree swing. Take the gate ring. Click on the electrical panel. Open it with the crowbar and take the gate ring.
  • Move right towards the tractor yard.

Infected: The Twin Vaccine

  • Click on the van to start a hidden object hunt. Find all the objects written in white. A window latch is added to your inventory.
  • Move down two scenes, then go left towards the barn.

Infected: The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the gate ring. Use the crowbar on the window and take Theresa’s bow (keepsake 10/18).
  • Move left.

Infected: The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Take the gun latch and Tiffany’s necklace (keepsake 11/18).
  • Add the window latch to the window, then climb through to enter the barn.

Infected: The Twin Vaccine

  • Click on the left window. Take the gate ring. Click on the debris under the left window. Take the heart gem.
  • Move down three scenes, then go right towards the tractor yard.

Infected: The Twin Vaccine

  • Click on the X on the ground. Dig up the ground with the shovel (click four times). Add the heart gem to the box, then take the letter opener.
  • Move down, then move towards the barn and go right again.

Infected: The Twin Vaccine

  • Click on the mailbox. Open the letter with the letter opener and take the shotgun shells.
  • Climb through the window into the barn.

Infected: The Twin Vaccine

  • Click on the shotgun. Add the shotgun shells and the gun latch. Take the shotgun and mother’s music box (keepsake 12/18).
  • Click under the right window to start a hidden object hunt.

Infected: The Twin Vaccine

  • Shoot the 12 targets. A monkey wrench is added to your inventory.
  • Move down two scenes.

Infected: The Twin Vaccine

  • Click on the faucet. Take the lock of hair (keepsake 13/18). Use the monkey wrench on the faucet and the bunker key is added to your inventory.
  • Move left.

Infected: The Twin Vaccine

  • Click on the bunker door. Take the gate ring. Unlock the door with the bunker key. Enter the bunker.

Infected: The Twin Vaccine

  • Click on the answering machine. Press the green PLAY button. Watch the cutscene. Take father’s request (keepsake 14/18). Click on the electrical panel. Smash it with the crowbar and take the gate ring.
  • Click on the work table to start a hidden object hunt.
  • Find all the objects written in white. TV cables are added to your inventory.
  • Click on the television. Add the tv cables. Watch the cutscene. The home video is added as keepsake (15/18).
  • Move down three scenes, then go right towards the tractor yard.

Infected: The Twin Vaccine

  • Click on the tractor. Take the tractor key and the nursing blanket (keepsake 16/18).
  • Move towards the gate.

Infected: The Twin Vaccine

  • Watch the cutscene. Take the gate ring. Add the 12 gate rings, then take the train emblem and father’s licence (keepsake 17/18).
  • Move down two scenes.

Infected: The Twin Vaccine

  • Click on the right train’s panel. Insert the tractor key, then cover it with the train emblem. The window above opens. Take the twins’ locket (keepsake 18/18).
  • If you have found all 18 keepsakes, the book will open to show them to you. Click the X to close the book. Watch the cutscene.

The end!