|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. 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 this was too tedious to keep updated, and was cancelled.
To find the latest updates on Chamber One, you can view their ModDBpage.