Meleed 5 soldiers
Punted 20 Bombas
Got 50 headshots
Got 100 soldiers to scream
Destroyed the helicopter that was attacking the vice president
Killed a soldier with a Bomba
Made it from one end of the lake to the other in hyperspeed
Completed the game on any difficulty setting
Completed the game with 100% of the items
Completed the game with less than 13% of items
Completed the three challenge packs in the Proving Grounds
Leveled up to experience level 50
Turned on your flashlight
Knocked back enemies 1 kilometer total with melee attacks
Killed 200 soldiers with a gun emplacement
Unlocked the entire game map
Collected all the missile packs
Collected all passkeys
Collected all the grenade packs
Collected all the gold bars
Collected all the foam canisters
Completed the Omega Armor
Defeated a Spidertank by drowning it
Defeated a Devastator with a foam grenade
Defeated a Mech with the Inertial Element
Ran 10 kilometers total in hyperspeed
Took 20 rides on the mine cart
Rescued Claire
Did a triple jump
Leveled up to experience level 10
Did 5 consecutive headshots without reloading or taking damage
Performed each type of melee attack: Dropkick, Hanging Takedown, Drop-down Takedown, Double Takedown
Killed an enemy with the Hookshot.
Completed the final fight in less than 1 minute 30 seconds.
Completed the game at 100% in under 2 hours on any difficulty
Completed the game at 100% in under 3 hours on insane
Completed the game at 4% with only the Flashlight, Backpack, Grenade, Foam and Missile
Completed the game by abandoning Claire to her fate
Completed the game with 8 Health Packs, 19 Grenade Packs, 20 Foam Packs and 9 Missile Packs 8/19/09