Kerbal Space Program.

So I just stumbled upon this neat little game called Kerbal Space Program. It’s a sandbox style game that allows you to build your own rocket and "attempt" to reach orbit, Space flight is hard! Who knew!? A bit frustrating.......who am I kidding, it’s downright hard the first couple of times but once you get a grasp of how the games physics engine operates and a few....hundred dead Kerbals it’s easy to lose hours at a time playing this.

You can give the demo a shot or purchase the game at: https://kerbalspaceprogram.com/demo.php

Note that the game is still in beta but once you purchase it all subsequent updates are free.