As part of their ongoing plan to make other developers look terrible, Valve released another free downloadable update today for Portal 2 – a game we dubbed “quite possibly the greatest first-person puzzler ever.” Styled as the “Perpetual Testing Initiative” and available on Steam to begin with, the DLC gives fans something they’ve long pined for. And no, we don’t mean real portal guns unfortunately.

Ladies and gentlemen, boys and girls, children of all ages – it’s the moment you’ve all been waiting for! After a solid month of looking at the good, the bad, and the ugly of 2011, we at Gamezebo have put together our picks for the 10 best games of 2011.

Over the last few weeks, we’ve looked at the best of everything that we cover here at Gamezebo. Facebook, iPhone, iPad, Android, Browser – pretty much everything. Well... everything except PC games. But you didn’t think we’d forget about all of the fun we’ve had with a keyboard and mouse in 2011, did you?

Valve has announced that a trio of Steam games will now feature in-game gifting, including Portal 2, Spiral Knights, and the newly free-to-play shooter Team Fortress 2.

Portal 2 provides some of the most exhilarating and refreshing puzzles you will ever see in a video game. With each new room comes exciting new prospects, fantastically witty dialogue and the urge to explore and conquer. This is one of the greatest gaming releases of the last decade, and it's both the perfect introduction into first-person shooter gaming and a lovingly crafted rush for more veteran players.