|Games needed||Portal 2|
Chamber One is a mappack, revolving around the use of the same chamber in unique ways.
This was previously planned to be a mod. due to team member issues, it laid dead for two years, before resurfacing during the Perpetual Testing Initiative. Most of the maps have not yet been released, but are being developed.
A Chamber 2 was planned to be in development with a second developer, but it was cancelled due to lack of communication.
To find the latest updates on Chamber One, you can view their ModDBpage.