Katana ZERO

On the Studio level, you will stumble upon a robot on the Space Uncertainty set who tells you he is programmed to kill humans. Don't kill him and proceed through the area as you normally would. After acquiring a keycard, as you're passing the robot on your way back, he will thank your for sparing his life. Listen to him until he explodes and the achievement is yours.

During the level Studio 51 you encounter a robot. Let him live. When you are returning back to the elevator with the yellow keycard you will pass by the robot again. he will self destruct and you will unlock the achievement No love for robots.