Doom 3:Evolution

as well as Weapon and Augment upgrade system. In a couple of words- this mod will give Doom 3 the depth it deserves, by introducing various new tools and skills, and a great variety of possible characters.
Doom 3 Evolution is a Single-Player Game-Play Conversion Mod. It is meant to be played with original Doom 3 storyline/levels. The main features of this mod are it's original Class and Skill system,