UFO (Unidentified Flying Object) was released for play to the personal computer running the MS DOS operating system in the very late eighties. It was both published and developed by subLOGIC. UFO plays from a first person perspective and is classified as a futuristic flight simulation game.
UFO uses a modeling system that was designed for a Flight Simulator series by Bruce Artwick. You actually will be piloting a UFO, as opposed to a sleek modern airship designed to gun one down.
Controls will be foreign to even the most experienced flight simulator gamer, because they are made to be unearthly and alien, so to speak. Basically, you will use your ship to explore the earth. There are two sorts of propulsion systems that you will have to get accustomed to (thrusters and a gluon system) as you navigate the planet seeking fuel sources for the larger ships of your species. When you find a fuel source, you can take it back to the mother ship and trade it for supplies. Use the tractor beam on board the mother ship to dock, or to capture earth vessels.
As you navigate the planet, you
want to do your best to avoid detection by the humans. If they discover you, achieving your goals will suddenly become very, very messy.