A cancelled Fighting RPG hybrid by the makers of Deus Ex (Patreon)

Gladiator 3000 was a pitch from Ion Storm (the team behind such titles as Daikatana, Deus Ex and Anachronox) to Origin for a 3D man-to-man RPG combat simulatorthat would have been developed for the PC: http://www.unseen64.net/2015/11/30/gladiator-3000-ion-storm-cancelled-pitch-pc/