Gex is a platformer video game series, developed by Crystal Dynamics, that details the adventures of an anthropomorphic gecko named Gex. Gex has a passion for TV, which makes him a target for the cybernetic being, Rez, who is determined to overthrow The Media Dimension, the "world" of television. He has also served as the mascot of Crystal Dynamics, appearing on their company logo for several years. In the North American version, Gex is voiced by comedian Dana Gould throughout the entire series; The United Kingdom version features Dana Gould, Leslie Phillips and Danny John-Jules as Gex's voice throughout the series.
The games are largely inspired by American TV-culture. Gex also contributes to the games with wise-cracking remarks laced with media and pop-culture references, reminiscent to the catchphrases of Duke Nukem and most notably those of Ash Williams, the protagonist from The Evil Dead films.
The concept of the Gex games (particularly the main villain wanting to take control of the world through TV) was also reinstated into Ape Escape 3.
Gex also appears as an unlockable character in the North American and European versions of Hot Shots Golf 2.
A fourth Gex game was in development by Crystal Dynamics for the PlayStation 2, but was cancelled and never officially announced for unknown reasons. Several pieces of concept art form the project were leaked.
The Gex series has sold a combined total of over 15 million copies for all platforms. Gex 3 is the best selling of the series, shipping over 6 million copies and also became the best-selling PlayStation adventure game of 1999 with 3 million copies in that year alone.
Source: Wikipedia, "Gex (character)," available under the CC-BY-SA License.