A Source Mod for Valve's Video game, Portal that takes you back to a build from December 26th, 2006.

This mod includes:
- Fully working original maps from 2006 sources.
- Working storyline and old versions of extended test chambers.
- Original game scripts.
- Original effects, models and textures.

How to install:
Unpack archive to steamapps/sourcemods folder.
You must have Source SDK Base Singleplayer 2013 installed with enabled "-upcoming" beta branch.

Autors: Portal Project-Beta Team
ModDB page