Achievements...
	Alternate Sound FX...

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Bravery ( 15 points )	Use only your knife to beat the Harbor Level.
Fair Fight ( 10 points )	Reach the mortar without defeating any unarmed soldier in Missile Base.
Good Start ( 10 points )	Complete the Missile Base.
Knife Master ( 20 points )	Complete all levels using only your knife and no powerups.
Mad Marine ( 30 points )	Rescue the POWs twice.
Not Bad ( 10 points )	Get a score of 50,000 or more.
Reflexes ( 15 points )	Complete the Missile Base without dying.
Stamina ( 15 points )	Complete the Bridge Level.
Stealth ( 15 points )	Complete Missile Base, defeating less than 18 enemies.
Teamwork ( 20 points )	Score 200,000 or more playing an Xbox Live co-op match.
True Marine ( 20 points )	Rescue the POWs in less than 10 minutes.
Victory ( 20 points )	Beat the Enemy Prison Camp.

Press Up(2), Down(2), Left, Right, Left, Right, B, A at the main menu. A meow will confirm the code was entered correctly.