I was asked to make a small review on minecraft, so i'll go forward.
MineCraft, is agame made by "Notch". on minecraft's website you can play for free a sandbox version of the game where you can just hang around the world generated by the game and place blocks, which is really cool for some people who will make Giant structures or just art.
However, if you purchase minecraft, you will enter in a giant world filled with caves to explore. you may even find diamond if you dig deep enough. Whenever you mine a block it will give you some recources (diamond ore if you find a diamond vein). you can build
a lot of items with the different thing that you harvest
(pickaxes, axes, swords, armors, ...).
Yet, the best part of minecraft is, in my opinion, when the night arrives or when you are going in a deep cavern because it will cause different kind of monsters to spawn around and try to kill you. The enemies that are the funniest and the worth at the same time are called "creepers" they will walk near you and explode in an attempt to take your life, but there are also spiders, skeletons and even zombies.
This video shows someone who traped a few of these creepers and caused them to explode ... quite scary when you think that tonight one of them might wait you in your cave.
In Minecraft the only thing that limits you is your imagination, it became even more true when the multiplayer started. Thanks to the multiplayer you can go and build floating castles, underwater domes, and even more things.