The Black Heart
When your job gets too stressful, and you just want to shake off everything; take a mini break and play The Black Heart. This horror styled, macabre, beat 'em up game will definitely give you your fix. You don't only get to release some stress with this game but the bonus is that it is visually arresting. In fact, I think it rivals most commercial games out there in terms of style and production values.
So sit back, relax, pick your favorite characters and start beating the hell out of your oppenent in The Black Heart.