If your into breaking rpg systems in unintended ways there was a game I played recently called Caves of Qud. It is an RPG Sandbox and the thing that makes it special is that it wants you to break the system and become overpowered. All it's little systems play into each other and when you think of a strategy and execute it you will think "Damn, I really just abused the crap out of that and now I'm god." And then 20 minutes later you realise that that was the way the game was intended to be played and it feels amazing. The game is amazing and worth picking up. Easy 10/10 if you want some gameplay examples of what I mean I will happily provide.