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
