Kerbal Space Program was released last month, and has since been updated multiple times adding new items and features. It's essentially a rocketship building simulator, with players putting a shuttle together and then launching into into the depths of space.

That's if you manage to actually get to space, of course. You may well run out of fuel before you get there, or your ship design might not be up to scratch, leading to something randomly exploding mid-flight. All the while, three little spacemen in the corner of the screen show their delight/fear at the antics through which they are being involved, and having to watch them die is a heart-wrenching moment.

There isn't much in the way of objectives or challenges at the moment, as that part of the game is yet to be added. It's still great fun to build your own vessels, though. Give it a download from the official site.