Here are some cheats and tips for the game Contra: The Alien Wars.
Level skip:
Enter H2F2 as a password. Press Start during
game play to jump to the end of the level.
Unlimited lives:
Enter B32R as a password.
Secret level:
Enter BIER as a password.
Level Password
2 3KNT
3 MDWH
4 2S3W
5 1Z5C