Here are some cheats and tips for the game Contra.
SLAIUZ Start with infinite lives
GXIIUX Keep weapons after losing a life
SLTIYG Become invincible– enemies don’t shoot at you
PEIIXZ Start new life with machine gun
ZEIIXZ Start new life with flame-thrower
LEIIXZ Start new life with spread gun
GEIIXZ Start new life with laser