Spleef: A multiplayer game
Many Minecraft players like to play a free-for-all game called "Spleef." Basically two or more players create a square stadium (maybe about fifteen to twenty blocks long or wide) that is floating or above lava or water. The object of the game is to destroy the blocks (stone and dirt are best) around your opponents either with or without tools. Players can choose whatever tools to use, however you can set rules (for example, no diamond pickaxes). The players are supposed to try and make their opponents fall through the stadium, and therefore be eliminated. The last player standing is the winner.