Abandonware games beginning with letter X sorted by popularity

UFO: Enemy Unknown (or X-COM: Ufo Defense) is a sci-fi tactical strategy game created by Julian Gollop set in a not-to-distant future where aliens are invading the Earth. The gameplay switches between tactical combat, where you fight aliens in a turn-based fashion, and strategic micromanagement, where you manage your X-COM base and personnel.

Xenon 2: Megablast is a classic shoot'em up developed by Bitmap Brothers and released by Image Works in 1990 for DOS and for a plethora of other systems. Xenon was good, Xenon 2 was far better. Compared to today standards Xenon 2 is perhaps a mediocre shoot 'em up, but at the time every shooter fan loved it. Plus, it was developed by Bitmap Brother...

X-COM: Apocalypse is the third installment of the very popular X-COM franchise. After X-COM: Ufo Defence and Terror From the Deep, fans expected another smash hit. Apocalypse is quite different under many aspects, from gameplay to aesthetics. X-COM Apocalypse was designed by Julian Gollop (the same designer that brought the original X-COM to l...

X-COM: Terror from the Deep is a DOS science fiction tactical strategy game, the sequel of one of the most popular DOS games in history X-COM Ufo Defense. Terror from the Deep was designed by Stephen Gross (the X-COM original being designed by Julian Gollop) and was published by MicroProse Software back in 1995. Terror from the deep doesn't change ...

X-Men: Children of the Atom is an abandoned fighting action game developed by Capcom and released by Acclaim Entertainment in 1997 for DOS and it's a conversion from the arcade version. X-Men: Children of the Atom was also published for consoles: Sega Saturn and PlayStation. As the title suggests, it's based on the Marvel comics characters known as...