Fightoon was the working title of a fighting game for the Sega Dreamcast that was being designed by Manoel Kasimier, better known as Fragger. Fragger is best known for nxMakaqu, his continuation of Stuart Dalton's nxQuake, a port of idSoftware's Quake.
The game was going to use the Quake engine and was made to run on nxMakaqu. It was a cartoon styled three dimensional cell-shaded fighting game, with single player and multiplayer modes.
On June 3, 2007, Manoel Kasimier announced that Fightoon was cancelled.