30 Lives: Press Up(2), Down(2), Left, Right, Left, Right, B, A at the title screen.
Achievements: Complete the following achievements to unlock Xbox Live Gamerscore points:
Armory (10 points): Collect gout different weapon power-ups. Bulletproof (25 points): Complete the game in Arcade mode using only 1 credit. Full Assault (30 points): Complete the game in under twelve minutes. Infiltration (15 points): Destroy the alien tower at the end of the water level. Partnership (20 points): Complete the game in Xbox Live Co-op mode. Proficient (20 points): Complete the second tunnel with a score of 100,000 or more in Arcade mode. Team Work (10 points): Score 100,000 points in an Xbox Live Co-op game. Tunnel runner 1 (10 points): Beat the first timed tunnel with 33 seconds or more left. Tough Guy (20 points): Get to the second tunnel without obtaining a single weapon upgrade. Tunnel runner 2 (15 points): Beat the second timed tunnel with 55 seconds or more left. Untouchable (10 points): Get to the first tunnel without losing a life. Well Equipped (15 points): Collect three different weapons in the second tunnel.
