Like the second volume of a textbook, 3 Blokes Studios has created another series of gray-matter exercises with Brainiversity 2. They've learned a little bit from their first outing, and added some new games to the routine. Brain training games really exploded when Nintendo released Brain Age for the Nintendo DS. It was a series of games that purportedly made your brain stronger by "exercising" different parts through targeted activities. Since then, there have been many different brain-training games from different studios. The first Brainiversity was a decent collection of games that had all the trimmings of a brain training game: a cute mascot, trackable progress and a nice selection of 16 games.