Contra III: The Alien Wars/Codes and passwords

Each version of the game has unique codes and passwords.

Super Nintendo
These are codes for the 1992 game known as
 * Contra III: The Alien Wars
 * Contra Spirits
 * Super Probotector: Alien Rebels

Infinite lives

 * The Attack Ship in Stage 3 spawns infinite enemies, which can be exploited for infinite points. Equip the machine gun and move as far to the left as possible so you can fire to the right. Enemies will keep coming and get killed by your bullets, racking up points, which translates into lives (up to 29). If you get bored you can tape the fire button down (or use a binder clip) and go do something else.

Game Boy
These are codes for the 1994 game known as
 * Contra: The Alien Wars
 * Contra Spirits

Passwords
Unlike the original version, the Game Boy port had a password system allowing you to start at any level.


 * B32R - Stage 1 with infinite lives
 * 3KNT - Stage 2
 * MDWH - Stage 3
 * 2S3W - Stage 4
 * 1Z5C - Stage 5
 * F5F5 - Stage 5 with Flamethrower, extra lives and bombs
 * H2F2 - Stage skip
 * BIER - Secret stage

Game Boy Advance
These are codes for the 2002 game known as
 * Contra Advance: The Alien Wars EX
 * Contra: Hard Spirits
 * Contra Advance

Passwords
The Gameboy Advance port also had a password system, though more complex than the Game Boy version.
 * Stage 2
 * 11111N TYLH1Z FCS5H1</tt> - Novice mode
 * 111111 TYLH1S 35MYH1</tt> - Normal mode
 * Y4HC1B L5P212 34ZWF1</tt> - Normal mode with 99 lives
 * Stage 3
 * 111113 TYLH1W BHZXZ1</tt> - Novice mode
 * 11111H TYLH1X QTTH1B</tt> - Normal mode
 * WXJD1Z JHSJ1Q KKNCY1</tt> - Normal mode with 99 lives
 * Stage 4
 * 11111B TYLH1T XLGHSB</tt> - Novice mode
 * 11111J TYLH1Z MY1RSB</tt> - Normal mode
 * ZWJF1J MGSL1B GP3LQB</tt> - Normal mode with 99 lives
 * Stage 5
 * 11111V TYLH13 2D21LC</tt> - Normal mode
 * G3421N TDN51N C3BV2C</tt> - Normal mode with 99 lives
 * Stage 6
 * 11111M TYLH1V CFDJDD</tt> - Normal mode
 * W3MJ1S J4VP1N YY24BD</tt> - Normal mode with 99 lives