Game Mods...
	Various Achievements...

Complete the indicated task to unlock the corresponding mod.

Mod	Task
Double-Physics	Complete Campaign mode under the Medium difficulty. This mod doubles the force of explosions.
Hollywood Mode	Complete Campaign mode under the Easy difficulty. This mod gives enemies big heads.
Tough Guys	Complete Campaign mode under the Hard difficulty. This mod enhances the health of enemies.

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Color Me Impressed ( 10 points )	Complete a mission on Normal without dying, failing, restarting, or continuing campaign.
Droppin Bombs ( 5 points )	Call in the airstrike to defeat the Command Center.
Hummer ( 10 points )	Kill 15 enemies on the HMV turret.
Kaboom ( 5 points )	Destroy the gas station.
Long Range ( 10 points )	Kill 20 enemies with a sniper rifle.
One Hundo ( 50 points )	Unlock all the unlockables.
Pool and Dive ( 5 points )	Survive the pool attack.
Private ( 15 points )	Complete the game on Easy Difficulty.
Rocketman ( 10 points )	Kill 2 aliens with one Rocket.
Seen Your Video ( 5 points )	Watch an unlocked video.
Sergeant Major ( 50 points )	Complete the game on Hard Difficulty.
Staff Sergeant ( 25 points )	Complete the game on Normal Difficulty.