FlightGear
FlightGear is an open-source flight simulator. It is developed by skilled volunteers from around the world.
FlightGear has the ability to model a wide variety of aircraft. Currently you can fly the 1903 Wright Flyer, strange flapping wing “ornithopters”, a 747 and A320, various military jets, and several light singles. FlightGear has the ability to model those aircraft and just about everything in between.
SpaceEngine is a realistic virtual Universe you can explore on your computer. You can travel from star to star, from galaxy to galaxy, landing on any planet, moon, or asteroid with the ability to explore its alien landscape.
Classic racing game GTA2. Grand Theft Auto 2 retained the overhead viewpoint of Grand Theft Auto, as well as the car-stealing/telephone-answering formula of the original.
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Play a great majority of PS2 games on your PC with this Playstation 2 emulator. PCSX2 tries to replicate the Playstation 2 console.
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When used in conjunction with images of the original arcade game's ROM and disk data, MAME can currently emulate several thousand different classic arcade video games
Fast and powerful Android emulator that enables you to run Android apps and games on a Windows PC