GEX is a platform game developed by Crystal Dynamics. It was originally released for the 3DO in 1995; ports of the game for the PlayStation and Sega Saturn were later developed by Beam Software, and a PC version was licensed by Microsoft and released for Microsoft Windows. It was a pack-in game for Panasonic models of the 3DO later in the console's life. It is the first in the Gex series of video games, and introduces players to the title character, a wisecracking, television-obsessed gecko voiced by comedian Dana Gould, who must venture through the "Media Dimension" and defeat Rez, the overlord of the dimension who wants to make Gex into his new network mascot.

X--        Jump/Enter TV
Z--        Tail whip/Remote bar
C--        Tongue lash
V--        Run
F1--       Help
F2--       Start a new game
F3--       Pause
F4--       Toggle between full screen and window
F5--       320 x 224 window
F6--       640 x 448 window
ESC--      Exit the game