Single Player: Kill at least 3 enemies with a single grenade

Throw an alien down the sinkhole in Dark Heart

Find Nathan Gould

Assimilate alien tissue at the crash site

Kill a CELL operator with a giant donut in Lower Manhattan

Complete In at the Deep End

Complete the game on any difficulty

Defeat the flight deck invader

Escort Prophet to safety

Escape the mysterious structure under the mountain

Customize a weapon to use all 5 modification points

Enter the mines