Minecraft

Minecraft is a sandbox construction game created by Markus 'Notch' Persson. The game involves players creating and destroying various types of blocks in a three dimensional environment. The player takes an avatar that can destroy or create blocks, forming fantastic structures, creations and artwork across the various multiplayer servers in multiple game modes. 

It is also a game of survival, along with creativity. At night, monsters come out, and you must build a house, and craft tools to survive the night. All the Monster Mobs are creepers, zombies, spiders, skeletons, slime and endermans. The mobs in the nether, which is hell in Minecraft, are zombie pigmen, and ghasts. There are also animals in the game. Pigs, sheep, cows, wolves, and chickens. In the new update, there is a new animal called Mooshroom. A Mooshroom is a red cow that carries mushrooms. For all of the mobs and monsters, search them on Google Images and I guarantee you'll find many pictures of each one.

http://www.minecraft.net/