I just discovered a very nice little game. It's called Minecraft and is some kind of sandbox game. You can compare it to building objects with Lego. Currently, it's in alpha state which mostly supports singleplayer. Multiplayer is in work. It's in rapid development; there are often patches with new stuff and bugfixes of course. In Singleplayer, you can build your stuff (whatever you want) like in Lego, when it turns dark, there are enemies which are trying to kill you and destroying your stuff, so you'll need to defend and kill them with sword/armor! On next day you can start building further. The game gets very addictive - hopefully the multiplayer will come out soon.

Currently, some very very old versions are for free, though, you need to buy the game to get access to newer versions - 9,95EUR for the moment, but price will raise as soon beta starts.

Here are some videos which convinced me to buy: http://www.youtube.com/watch?v=4ev8UW1qa1Q&feature=search http://www.youtube.com/watch?v=oB6KADe7_WM&feature=related http://www.youtube.com/watch?v=bs-3f0HqxG4&feature=related http://www.youtube.com/watch?v=wFg67iiw4UE&feature=related

More Informations: -> http://minecraft.net/ - Official website -> http://www.minecraftforum.net/ - Official forums -> #minecraft at irc.esper.net

Here are some screenshots of the fortress I'm currently building: