http://www.toribash.com/
This was making the rounds at 4chan before half their boards crapped out. It's a turn-based fighting game where you control each major joint in the human body by applying rotational force. Each turn is about a fraction of a second long and in between you have a limited time to make any adjustments you can so it still retains a sense of urgency. At the end of a fight, you get a replay combining all the turns that looks pretty sweet.

Too fucking complicated!

It's daunting at first, but incredebly rewarding after a few hours when you start to pull off midair kicks, somersaults, decapitations and limb removals.

This game is addicting 0.o