I first discovered this game back in school at around 2010-2011 and it quickly turned into one of the defining games of my childhood. I wish I had some numbers but I am certain that I played hundreds of hours playing this game, installing countless mods, learning orbital dynamics, spaceflight history, and so much more. I flew to mars and back, landed on the moon, programmed flight computers (sometime catastrophically wrong), docked so many different vehicles in orbit and generally had the time of my life in this game. Dan's Orbiterpage and his world class mods for the game (including the excellent sound mod) really made this game (or sim, whatever you call it) shine. I probably also spent days of my life browsing orbithangar for the coolest new vehicles.

At some point I discovered Kerbal Space Program and eventually got older and had less time for Space Sims altogether, but Orbiter (especially the 2010P1 version) will remain closest to my heart.

I am really happy to see this game become open source.