Inverse Control?

[Masada]

Is there a supers system out there that has a mechanic for limiting a power that is out of control.

Something like Cyclops' eyes or the Hulk in a rage. I'd like to create a character concept where a "low" level hero has to struggle to not kill/destroy things.

 

[sukael]

Tri-Stat, though not a d20 game, has a character defect based on that. (I can't remember the exact name of it at the moment, though.)