Projex is a Valve's Portal Mod which is a personal creation that tributes the fabulous game of Portal. This is more of a skin rather than a real-game Mod of Portal, with additional puzzles. No scripts and or codes, I customized the MOD to adjust the look of the game and create basic puzzles for Leve
Credits: from Jocelyn Da Prato
http://www.theprojex.com