Kerbal Space Program
This painfully difficult but immensely interesting simulator allows players to piece together space shuttles and send them into orbit, often with disastrous results. You may need to brush up on your knowledge of physics before committing yourself to Kerbal Space Program, but the satisfaction of successfully sending a shuttle into orbit by far makes it worth it. A PlayStation 4 version was recently announced, which means this PC experience will be coming to console soon.
