Kerbal Space Program

[Whalenator]

http://kerbalspaceprogram.com/

Goals:
- Escape Earth's Atmosphere
- Orbit Earth
- Return to Earth
- Land on Pad w/o Parachute
- Orbit Moon
- Land on Moon
- Return to Earth from Moon
- Orbit Sun

EDIT: gotta catch em all. Got them with only 3 stages, boom back whack kerpow shablam.

Awesome game. Was linked to it in IRC.
It's a little indie title currently in open Beta. You combine parts and make your own spaceship. It starts out pretty hard, but I got the hang of it in an hour or so... great way to blow some time before Beta starts.

EDIT: Beat it in 3 hours. (Beating it defined as orbiting the Sun)