It is kinda strange, that if you just cut off the robot's arm or legs, they die, right?
Well, i got an idea to change that.
Presenting: Damaging.
Cutting head off a robot (not you): survives for about 5 - 10 seconds, can attack but very inaccurate
Cutting robot in half: instantly killed
Cutting robot's arms: Will live, cant use weapons but can kick.
Cutting off robot's legs: can use weapons (not bow), crawls at half of the normal speed.
Damage to you:
Head off: Instantly killed (mind is disconnected from the body)
In the chest: killed (core)
Halfed: killed
Legs off: crawl, can attack with sword
Arms off: can kick and distract enemies
I dont know if anyone done this yet, but this is the idea i have.