The links here lead to pages instructing you on how to turn off filters for that game.
The games are categorized by engine because games on similar engines typically have similar solutions, therefore potentially making it easier to find the solution for another game on the same engine. For example, Unreal Tournament and Deus Ex, both being on the same engine, share almost exactly the same solution. This is good because if a game doesn't have a solution written here yet but another game on the same engine does, you can probably use that to figure it out.
Dark Engine
System Shock 2
Thief
Gamebryo
Fallout New Vegas
Homeworld Engine
Homeworld
id Tech
Doom
Doom II
Final Doom
Chex Quest
Heretic
Hexen
Strife
Doom 64
id Tech 2
Counter-Strike
Half-Life
Quake
Quake II
id Tech 3
Quake III Arena
Quake Live
OpenMW
(Open) Morrowind
Serious Engine 1
Serious Sam
Source
E.Y.E. Divine Cybermancy
Team Fortress 2
Unreal Engine
Deus Ex
Unreal
Unreal Tournament
A game not listed? Here are a couple of general tips which can help you find the solution for yourself.