Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Use the Force, Edgar (5 points): Successfully complete the Sunny Day Farm level in Single Player Normal mode.
Dumb Flying Stingray (10 points): Defeat H.Y.D.E.E. in Single Player Normal mode.
Monkee Factory (15 points): Defeat K.R.I.S.S. in Single Player Normal mode.
Cry W.U.L.F.E. (25 points): Defeat W.U.L.F.E. in Single Player Normal mode.
2 Fast, 2 Serious (15 points): Spawn twenty 'Maximum Charge' lightning bolts in a row in any Single Player mode.
Survivor Man (30 points): Complete the game in Survival mode.
Gold Farmer (25 points): Earn a Gold medal in all levels of Single Player Normal mode.
Everyone Does It (10 points): Complete all levels of Online Cooperative mode.
Terrorize This (15 points): Come in first place in 10 Online Multiplayer Destruction matches.
Search & Destroy (20 points): Complete any level in Single Player Normal mode with more than $9,000,000,000 of destruction.
Cute Overload (10 points): Create the Overload superpower in Single Player Normal mode.
Hippy Intimidator (20 points): Complete Sunny Day Farm with all trees destroyed in Free-For-All mode.