Quake 2 Total Conversion — Entron: Freedoms Edge, by Endor Productions

"Entron: Freedom's Edge takes you in to the dark world of Entron, a world where Freedom no longer exists. A world under the rule of a demented dictator, known as the Overseer. You play the role of C'tal, a slave working in the Derantium mines of Entron, who rises up to defeat the Overseer. The fate of your people and your world lies in your hands."