If this section looks familiar to you, that's because you may have seen something just like it in my Doom 3 Tweak Guide. These various methods usually result in the same outcome for each command, however they provide flexibility in the ways in which you can test, add, edit and remove cvars for the game. There are four main ways in which you can implement command variables in Half Life 2: In the game's Console through Config (.cfg) files in the Steam Launch Options box or in your game icon's Target box. This section provides details of how to tweak Half Life 2 correctly using the command variables, and the next few pages provide a list of the more useful command variables and what they do. This gives us an excellent opportunity to tweak Half Life 2 to its fullest potential. The Source Engine by Valve is highly customizable: there are over 1800 Command Variables (cvars) which can be used to alter everything from the way the game allocates memory to providing additional game information to recording demos and running custom benchmarks. You can change more than just the handful of settings available under the in-game options in Half Life 2.
