Plot: X-COM: Interceptor is the fourth main game in the X-COM series, developed and published by MicroProse in 1998. The game is a combination of many genres, including space flight simulation, business simulation game and strategy game elements. Wikipedia
Plot: X-COM: Apocalypse is a 1997 science fiction turn-based tactical strategy game. It is the third game in the X-COM video game series. It was developed by Mythos Games, and published by MicroProse in 1997 for MS-DOS and Microsoft Windows. Wikipedia
Plot: X-COM: Terror from the Deep is a strategy video game developed and published by MicroProse for the PC in 1995 and for the PlayStation in 1996. It is a sequel to UFO: Enemy Unknown and the second game of the X-COM series, this time taking the war against a renewed alien invasion into the Earth's oceans...
Plot: XCOM 2: War of the Chosen is an expansion pack for the 2016 turn-based tactics video game XCOM 2, released for Windows on August 29, 2017. Versions for macOS and Linux were released on August 31, 2017, and a Nintendo Switch port was released on May 29, 2020. Wikipedia
Plot: The Bureau: XCOM Declassified is a 2013 tactical third-person shooter video game. It was developed by 2K Marin and published by 2K Games. Wikipedia
Plot: X-COM: Enforcer is the sixth game in the X-COM series, but takes place in a time line separate to that established by the first four games of the series. Enforcer is as a purely action third-person shooter, not containing elements of strategy game unlike the previous games. Wikipedia
Plot: XCOM: Enemy Unknown is a 2012 turn-based tactical video game developed by Firaxis Games and published by 2K Games. The game is a reimagined remake of the 1994 cult classic strategy game UFO: Enemy Unknown and a reboot of MicroProse's 1990s X-COM series. Wikipedia