Minecraft!

A man named Notch single handedly coded and currently updates a game called 'Minecraft' which is essentially a block based exploring/spelunker game. The game is in Alpha right now and should be in beta soon. It has multiple game modes including Classic, which has unlimited resources and it's mainly for building different creations with your blocks. Classic has both single player and multi-player so you and some friends could build different creations together. The other game mode is Alpha (the main base of Minecraft) is a mode where you start in a randomly generated world with 0 resources and have to gather different types of resources whether it be dirt, wood, stone, iron, diamond, etc to survive. You can play the classic version for free but if you want to experience the game fully you have to purchase it through paypal for around $13 or 10 euros. The price will be raised when Notch finishes updating the game through alpha/beta so it's best to buy it now. There are other modes you might know about if you played through early alpha but at the moment the main ones are classic and alpha. Check out Notch at http://notch.tumblr.com/ http://twitter.com/xnotch or check out Minecraft at http://minecraft.net/!

TL;DR Minecraft is an awesome game, check out links.