all within the week they came out (remember speech packs?).
I played Wolfenstein 3D the week it came out, as well as Doom 1-3, Ultima Underworld 1+2, Wing Commander and Privateer 1+2, Descent, Quake. To start off, I have played almost every FPS created, along with pretty much every RPG (except for Baulders Gate remakes with that isometric view nonsense.). Now, there probably is a topic like this somewhere, and I did see references in the Mod Archives to questions regarding different mods used in parallel, but just incase someone else out there wants to make the best game possible with all these wonderful mods and can't find a comprehensive package, well. After spending these hours doing so, I realized I could have saved myself the trouble had there been a topic about combining all the mods to make one killer game.
I've spent the past hour or two or 3 (definately three) reading the details of every Mod for System Shock 2 and downloading a fair share of them.