Claustrophobia is an Action/Adventure/Puzzle type mod in which you play a rebel in the Half-Life 2 universe fighting and solving his way through areas to get to safety.
Full release of Claustrophobia V1.1 All you need to play is Source SDK Base 2007. To install, extract the folder to C:\Program Files\Steam\SteamApps\sourcemods and restart Steam if it's already running.
how do you load this mod?
not bad, but you can be better!