Daidassou (1985)

In this super-deformed sendup of WWII action tales, you're an Allied soldier infiltrating Axis prison castles to rescue your squaddies. Sneak and shoot your way through each level to releases your friends from their cells and then escape. You're armed with a pistol and limited ammo, facing a variety of Nazi-like guards patrolling the alleys and quarters you must also traverse. Disable these enemies, steal jail keys from them, and finish your prison break without a hitch!