Adventure Mode is a Game mode created by the Mojang team, and it was first introduced in Minecraft's 1.3.1 release. Inside of Adventure Mode, one can only break blocks with the right tool, for example, a pickaxe cannot break a Log, and an axe cannot break Dirt. This makes custom maps much more challenging, since contestants cannot cheat. This does not prevent the player from killing mobs, as a player can kill mobs with any tool or item. One can set their game mode to Adventure when opening a world to LAN, or in-game by using the command: "/gamemode @p 2".