A Little Help from Your Friends (25) - Complete the Multiplayer game.
All Hail The Splode King (25) - Complete the Single Player game in Hardcore mode.
Eventual Destruction of a Galaxy (10) - Be on the lookout for an old friend.
Get Over Yourselves (10) - Select "Credits" from the "Help & Options" menu and watch the whole thing.
Get Them Out of Our Schools (10) - Eliminate 10 Scientists and stop them from spreading their filthy lies.
Lay Off the Caffeine (10) - Let your hyper little brother play the game for a bit.
Master of Controls (10) - Master the mastery of controlling your controls.
Not a Portal Reference (25) - Collect all 47 cakes in Single Player mode.
Omaha Steaks?, Delicious! (15) - Create 5,000 filets.
Only Gandhi Would Be Proud (10) - How long can you handle being a pacifist?
Sugar High (25) - Collect all 47 cakes in Multiplayer mode.
You're the Best Around! (25) - Complete the Single Player game.
GamesRadar is the premiere source for everything that matters in the world of video games. Casual or core, console or handheld - whatever systems you own or whatever genres you love, GamesRadar is there to filter out what's worth your time and to help you get even more from your games. We deliver the best advice, the most in-depth features, expert reviews, and the essential guides for all the top games.