Ending 2 loops of the game without killing any soldier with the gun. Exceptions could be detailed in this info:
Stage 1: Destroying the electric fence by shooting it and passing through the next stage.
Stage 2: Killing only the 2 mega-soldiers who throw crates, or killing just 1 mega-soldier), also just using the bionic arm to get hooked in some safe spot. (Killing the kamikaze soldiers by shooting at them not allowed, and not using the bionic arm at them: exploding when that happens).
Stage 3: Killing only the 2 captains in the final scene. Any other soldier killed in the scene is not allowed, including the 2 mech-robots in the scene.
Stage 4: Killing only the captain, the flamethrower trooper, and the 2 majors/commanders in the final scene. Any other soldier killed in the scene is not allowed.
Stage 5: Killing only the 3 captains and the general when you are going up in the flamethrower trooper zone. (Killing the 2 flamethrower troopers is not allowed).
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