MechWarrior 2: 31st Century Combat is a 3D vehicle combat sim game created by Activision and released in 1995 for MS-DOS. It was ported later to Windows and Mac, in addition to the console versions released in 1997.
One Must Fall: 2097, developed by Diversions Entertainment and published by Epic MegaGames in 1994, is set in the future where fighting between humans is outlawed. Of course, humans being who they are, need a way to fight each other.
BattleTech: The Crescent Hawk's Inception is a sci-fi RPG created by Westwood Associates and published by Infocom initially for MS-DOS in 1988, then ported to Atari ST, Apple II, Commodore 64, and Amiga (in 1989).
MechWarrior is a vehicle simulation game developed by Dynamix and published by Activision. The title was created in 1989 for DOS but was later ported to Sharp X68000 in 1992 and PC-98 home in 1993.
VectorMan is a run and gun game developed by BlueSky Software and published in 1996 by Sega for the Genesis and the Sega Mega Drive. The title was also released in compilations of Sega for other consoles.
Thexder is a platform shooter videogame developed by Game Arts and released for DOS, Amiga, Apple II, MSX and several other platforms in 1987. You control a robot that is able to transform into a jet.