Portal 2 Beta Library
A collection of playable Portal 2 beta and pre-release builds, taken from the Steam2 Content Server Dump.
Info
Some builds are ready-to-play repacks by members of the community, whereas some that required manually adding patches, I have added for you, alongside some Start.bat files :)
All of these files are playable directly by launching using the Start.bat or Start.sh file in the folder.
Small warning: These betas are either extremely prone to crashing, or may not crash at all on your system. Make sure you save your progress often.
Big warning: Multiplayer has remote code execution (RCE) vulnerabilities. It is HIGHLY recommended you either don't use it, or only play with people you know, and trust.
How to play
Download the game. Extract it.
If there is a "steam_appid.txt" file, make sure it is set to "480".
Windows: Run Start.bat, if missing you can make one.
Linux: Short guide.
Builds
| Build date | Download link(s) | Notes |
|---|---|---|
| July 2009 - 852_0 | Download | PSBR member Tectonic's fix and repack. |
| February 2010 - 841_0 | Download | PSBR member Xanderrock98's fix. |
| March 2010 - 852_1 | Download - Alternative - Manual patches | My repack, containing fixes by PSBR members bruno, RickyPortal6, and IntriguingTiles. |
| July 2010 - 852_2 | Download - Manual patches | My repack, including texture/model fixes by PSBR member bruno. |
| August 2010 - 852_3 | Download | |
| 24 September 2010 - 841_1 | Download | |
| 26 September 2010 - 841_2 | Download | |
| October 2010 - 852_4 | Download | |
| December 2010 - 852_6 | Download | |
| January 2011 - 841_3 | Download |
FAQ
Stuck on "NO STEAM"
Add -nosteam -console to the start file's launch options, or use this fix.
Notes
This site does not host any content itself, it links to file hosting pages.
I'm shamelessly borrowing most of this from the Portal Series Beta Research Discord (not that this is exactly official anyway). Sorry about that. I wanted a place for users who either don't want to search through a Discord server for download links, or want an easier way to play the builds.
Most content on this site comes from this message.
Last updated: 2026-09-04T21:42:05.575Z