Minecraft is a video game where users create cubic block constructions in order to protect a base from nocturnal monsters. The game comes into its own in multiplayer mode because the constructions become collaborative and creative. Only imagination can set limits to constructions that are possible to do with Minecraft. The game is on PC and Mac and also on iPhone and Android in "Pocket Edition" mode. The game is expandable with skins to give a different look at the world in which the characters evolves. The Minecraft players are numerous and share many videos on Youtube showing their achievements.
Note that you must have a premium account to play, that is, this game is NOT free!