With more than 8 million retail units sold in the first release of the game, Half-Life 2 is one of the hottest games on the market. Game modder Erik Guilfoyle shows would-be game developers how to install the editor, create mods, make game maps, add textures and characters, publish and distribute mods, add a new level to play, and even change the rules of the game. It offers advice for readers to take advantage of freely available 3D game engines to allow them to cut straight to the fun part creating the game rather than having to first create the technology necessary to build the game.
