

Particularly, you have an artifact that lets you slow down time and that you upgrade over the course of the story, gaining super speed and invulnerability while it's active. This is good, as it ends before it overstays its welcome, but still manages to fit several new weapons and enemies to spice up the gameplay. It's much shorter, lasting around two and a half hours, about a quarter of the base game. The story serves as an epilogue of the main game, having you play as a marine as the forces of hell overrun the UAC base in Mars (again). Resurrection of Evil is an expansion pack for Doom 3 that was released in 2005, a bit less than a year after the original game was released.
