Successfully complete the indicated task to unlock the corresponding mod:
- Double-Physics: Successfully complete Campaign mode on the Medium difficulty. This mod doubles the force of explosions.
- Hollywood Mode: Successfully complete Campaign mode on the Easy difficulty. This mod gives enemies big heads.
- Tough Guys: Successfully complete Campaign mode on the Hard difficulty. This mod enhances the health of enemies.
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
- 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.