How a programmer got Doom to run on a space satellite and what happened next

A programmer got the classic game Doom running on a European Space Agency satellite orbiting Earth, using the spacecraft's experimental computer that was 10 times more powerful than typical space hardware. The project demonstrated open-source software's adaptability using Chocolate Doom's C code, though graphics were rendered in software since satellites lack displays. The team replaced the game's Mars background with real satellite photos of Earth, showcasing both space technology capabilities and international collaboration in research.