Players are ice skaters on thin ice. As they skate they leave cracks behind them (which are drawn on the board with dry erase markers). Any area completely surrounded by cracks is unstable, so if you're surrounded by cracks you're out of the game. The goal is to be the last one still on the ice. Play is in two phases: first players write their "plans", and then they take turns moving their skaters each "step" of their plan.