Codes
30 Lives

Enter at the title screen.
Code ............................................ Effect
Up, Up, Down, Down, Left, Right, Left, Right, B, A 30 Lives

Unlockables
Achievements

Unlockable ...................................... How to Unlock
01. Armory ...................................... Collect 4 different weapon power-ups.
02. Team Work ................................... Score 100,000 points in an Xbox Live Co-op game.
03. Untouchable ................................. Get to the first tunnel without losing a life.
04. Tunnel runner 1 ............................. Beat the first timed tunnel with 33 seconds or more left.
05. Infiltration ................................ Destroy the alien tower at the end of the water level.
06. Tunnel runner 2 ............................. Beat the second timed tunnel with 55 seconds or more left.
07. Well Equipped ............................... Collect 3 different weapons in the second tunnel.
08. Tough Guy ................................... Get to the second tunnel without obtaining a single weapon upgrade.
09. Proficient .................................. Complete the second tunnel with a score of 100,000 or more in Arcade mode.
10. Partnership ................................. Complete the game in Xbox Live Co-op mode.
11. Bulletproof ................................. Complete the game in Arcade mode using only 1 credit.
12. Full Assault ................................ Complete the game in under 12 minutes.