Contra: The Alien Wars Cheats

Infinite Lives
For unlimited lives, enter the password “B32R”.

Level 4 in Easy Mode
Normally the easy game ends on level 3, but with this code you can access level 4. To do so, enter the password 21LN. Unfortunately, the game will end after Level 4.

Level Skip
Enter the password “H2F2″. While playing, press Start
to advance to the next level.

Passwords
Level Password
2 3KNT 3 MDWH 4 2S3W 5 1Z5C