Doom 3
From PCGamingWiki, the wiki about fixing PC games
Doom 3 is a science fiction horror video game developed by id Software and published by Activision.
Patches
Official
Unofficial but highly recommended
Parallax Mod Adds more depth to textures
OpenCoop - Coop the game online or on LAN with your buddies! Play the entire campaign start to finish, including expanchion pack. And extra challenge maps.