Here is the classic PC game "Heretic" running on the original Xbox. This game is one of many classic PC games that have been ported to run directly on the original Xbox. FPS (First Person Shooter) games have been especially popular.

Gameplay is flawless. The game features fully customizable controls, working save features, and ruble support.

Heretic is a fantasy first-person shooter video game created by Raven Software, published by id Software, and distributed by GT Interactive in 1994. It is now available on Steam.