Complete the game on any difficulty setting
Make it from one end of the lake to the other in hyperspeed
Punt 20 Bombas
Get 50 headshots
Kill a soldier with a Bomba
Melee 5 soldiers
Destroy the helicopter attacking the vice president
Complete the game with less than 13% of items
Complete the three challenge packs in the Proving Grounds
Level up to experience level 50
Get 100 soldiers to scream
Complete the game with 100% of the items