Contra

Cheat code - Get 30 lives:
While you are at the title screen just press Up(2), Down(2), Left, Right,
Left, Right, B, A.

Achievements:
Complete the following achievements to award the indicated amount of
Xbox Live Gamerscore points.

Well Equipped (15 gamerscore points):
Pick up three kind of weapons in the second tunnel.

Untouchable (10 gamerscore points):
Get to the first tunnel without losing a life.

Tunnel runner 2 (15 gamerscore points):
Clear the second timed tunnel with 55 seconds or more left.

Tunnel runner 1 (10 gamerscore points):
Clear the first timed tunnel with 33 seconds or more left.

Tough Guy (20 gamerscore points):
Get to the second tunnel without obtaining a single weapon upgrade.

Team Work (10 gamerscore points):
Score 100,000 points in an Xbox Live Co-op game.

Proficient (20 gamerscore points):
Finish the second tunnel and reach at least 100,000 points in Arcade mode.

Partnership (20 gamerscore points):
Finish the game in Xbox Live Co-op mode.

Infiltration (15 gamerscore points):
Blow up the alien tower at the end of the water level.

Full Assault (30 gamerscore points):
Finish the game less tahn 12 minutes.

Bulletproof (25 gamerscore points):
Finish the game in Arcade mode using only 1 credit.

Armory (10 gamerscore points):
Collect gout different weapon power-ups.