| corsix-th | Open source clone of Theme Hospital |
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| crashtest | Educational car crash simulator |
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| crrcsim | Model-airplane flight simulation program |
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| EmptyEpsilon | A spaceship bridge simulator game |
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| flightgear | Open Source Flight Simulator |
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| flightgear-data | FlightGear data files |
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| gl117 | Action flight simulator |
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| lincity | City simulation game for X |
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| lincity-ng | City simulation game |
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| micropolis | Free version of the well-known city building simulation |
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| openrct2 | An open source re-implementation of Chris Sawyer's RollerCoaster Tycoon 2 |
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| openttd | A clone of Transport Tycoon Deluxe |
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| pmars-sdl | Portable redcode simulator's sdl port for core war |
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| searchandrescue | Helicopter based air rescue flight simulator |
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| senken | City simulation game |
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| simutrans | A free Transport Tycoon clone |
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| simutrans-paksets | PakSets (scenario data) for games-simulation/simutrans |
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| singularity | Simulation of a true AI. Go from computer to computer, chased by the whole world |
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| sky-rogue | A fwooshy rogue-lite action flight simulator |
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| slime-rancher | Cute game where you cultivate slimes on a distant planet |
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| train-valley | Build railroads in order to connect cities, tunnels, and bridges |
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