Quake and Conquer, by Ryan Dobson — a Real-Time Strategy Game Set Inside the Quake 2 Environment

"Take all the techniques you know about Quake 2 and throw them away. Quake and Conquer is all about resource management and strategy. You can't resort to a gung-ho solo charge because - well, you just can't. Your player is a disembodied essence wandering the levels. You have direct control over your creatures and machines through your crosshair."

Paranoid: Quake 2 mod

Imagine being a Marine, packing ammo so tight that your eyes are turning blue, and carrying enough explosives to take out a small town. Your walking down a dark, gloomy hall way, having to watch your back while walking, and all of a sudden you smell a strong, snotty smell. You look up and theres a Broodling staring you down, drooling all over your new leather boots. You try to raise your gun up but you can't in time. Everyone pisses in their pants as you scream out in agony as your lower intestines spill out onto the floor. You have just experienced Paranoid... and thought you got over your fear of the boogy monster.