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.
This patch fixes most issues related to engine branch incompatibility and is designed to run using the latest "Beta" of Source SDK Base 2013 Singleplayer...
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...