Minecraft wiki entry for Spleef, associated text: Due to the flexible nature of spleef, the gamemode can be altered in many ways. A common variation is to create multiple levels of playing fields, and upon losing on one arena, you descend to the next. A common theme among variations is incorporating gameplay elements such as fire, explosions, or mobs. Some versions allow someone to destroy blocks from under the players, and others incorporate challenges such as not allowing players to jump. As stated in the rules above, hitting other players may occasionally be allowed as well.