Achievements...
	Getting through barriers...
	Golden guns...
	Health boost...
	Infinite Ammo...
	Map...
	Regaining health and ammunitio...
	Xbox Live Gamer Pictures...

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Bomba Punter ( 20 points )	Punt 20 Bombas.
Completionist ( 20 points )	Complete the game with 100% of the items.
Hero ( 50 points )	Complete the game on any difficulty setting.
Let's Get Punchy ( 15 points )	Melee 5 soldiers.
Look Out! ( 5 points )	Kill a soldier with a Bomba.
Make 'Em Scream ( 20 points )	Get 100 soldiers to scream.
Minimalist ( 10 points )	Complete the game with less than 13% of the items.
My Head A-Splode ( 20 points )	Get 50 head shots.
Proven Grounds ( 10 points )	Complete the Proving Grounds.
Serious Complex ( 10 points )	Level-up to experience level 50.
To Kill a Blackbird ( 15 points )	Destroy the helicopter attacking the Vice President.
Walkin' on Water ( 5 points )	Make it from one end of lake to the other in hyper-Speed.

Use the indicated weapon to get through the corresponding barrier color.

Color	Weapon
Blue	Friction Dampener
Green	Grenades
Orange	Fire Arms
Purple	Foam
Red	Missiles

Collect all twelve gold bars to unlock all golden guns which allows double experience points.

Reach level 10.

You can unlock unlimited ammo for the following weapons by reaching the levels below. Note: These effects carry over into a new game and can be used once you collect the weapon.

Infinite Foam Ammo - Reach Level 30
Infinite Grenade Ammo - Reach Level 40
Infinite Rocket Ammo - Reach Level 50

Alternately, you can collect all packs for a weapon to unlock infinite ammo for it.

Reach level 20 to unlock the full map that reveals the locations all items, weapons and other items.

Save the game at a checkpoint. Leave the room, pause game play, and select the "Load Checkpoint" option. You will retain your current health and ammunition and restart at the checkpoint where you can re-collect the health and ammunition there. Repeat this as many times as needed.

Get the following pictures for your Xbox Live profile by performing the following actions.

GamerPic 1 - Gather every component of XOS-7 Omega Armor
GamerPic 1 - Defeat the first Tarantula