Kerbal Space Program is one of the most fun games I have ever played (mostly because I love sandbox games)

You are in charge of building a rocket from the ground up (literally) and then tasking that rocket with getting into space (and hoping you don't suffer from Rapid Unplanned Disassembly) in the process.

I highly recommend it and it is worth the price as all future updates come free and it is highly moddable with a very active community. I'd actually like to see the workshop opened for this game at some point.

EDIT for Version .22

It introduces the fabled Career Mode! This mode starts you off at humble beginnings and lets every KSP player recreate those days of the early alpha when there were only around 5-10 parts available.

It adds a new level of challenge and new parts to gather...Science!

Fly to the Mun, to Minmus, or to Duna and beyond in the search of elusive science to build bigger and better parts.

Kerbal Space Program is one of the most fun games I have ever played (mostly because I love sandbox games) You are in charge of building a rocket from the ground up (literally) and then tasking that rocket with getting into space (and hoping you don't suffer from Rapid Unplanned Disassembly) in the process. I highly recommend it and it is worth the price as all future updates come free and it is highly moddable with a very active community. I'd actually like to see the workshop opened for this game at some point. EDIT for Version .22 It introduces the fabled Career Mode! This mode starts you off at humble beginnings and lets every KSP player recreate those days of the early alpha when there were only around 5-10 parts available. It adds a new level of challenge and new parts to gather...Science! Fly to the Mun, to Minmus, or to Duna and beyond in the search of elusive science to build bigger and better parts.