Project: Space Station was one of my favorite titles for the Commodore 64. It was an extremely multi-faceted game, especially for its time, but, for me, the most challenging tasks were 1) getting into the proper orbit on launch; and 2) safely returning to Earth (always to Edwards AFB at the time) following a Shuttle mission.
Yesterday's events brought back many fond memories of playing this game during the 1980's.
I've linked here to the ROM file; you'll also need an emulator, such as CCS64 (ccs64.com), to play.
(Description clipped from "The Underdogs" web site): "Before he developed a string of venerable flight sims for LucasArts, Larry Holland designed this exceptional NASA mission simulator that gives you the chance to build a space station. This gargantuan task requires astute planning of shuttle launches over the next 15 years to carry the necessary components for the station. NASA's help in the game shows in the excellent realistic factors, from budgetary concerns to R&D projects you can take in hopes of making discoveries that will save lives and time. An excellent simulation."