The Coven: Disposable Heroes, Deadlode 2, and more Quake II Total Conversion Mods

The Coven was an independent computer games developer with its roots in the Doom and Quake communities. Originally founded by John "Gestalt" Bye in late 1996, The Coven worked on a free Doom II add-on before moving on to Quake and going commercial in the summer of 1997. The Coven was closed in the winter of 1999, and all their work is now available for free.

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."