Fail to clamber up to the top of the growing flesh mountain in 60 seconds and you're out, usually to the sound of your mates shouting 'waheeeey' as a misplaced swing sends you tumbling down to the bottom. It has a bunch of modes, but in its purist form it's a multiplayer game about getting near naked dudes to climb on top of your friends near naked dudes. The original Mount Your Friends is a thing of beauty.