Preview Chambers
Below are all the latest released versions of all test chambers that have been completed enough to play. Not all are available yet, and not all consecutive chambers may link to each other.
To play a test chamber:
Ensure you downloaded the necessary materials and sounds.
Save the BSP file to one of these locations:
Windows: C:\Program Files\Steam\steamapps\common\portal\portal\maps
MacOS: ~/Library/Application Support/Steam/steamapps/common/portal/portal/maps
(On Windows 64-bit, replace “Program Files” with “Program Files (x86)”. On older versions of Steam, replace “common” with your Steam username.)
Launch Portal and open the developer console (you can enable the console in Options → Keyboard → Advanced).
Run "map z_chamber_#", where "#" is the number of the chamber.