The chamber23.zip file you have requested: Maps Levels Missions / Portal: Chamber 23 Map - 3.6mb is not available. Perhaps try browsing all files for the game Portal and upload any files you want to share or are missing. This is the only information we could locate:

Chamber23 ReadmeTo install unzip file and place map files into your folder namedSteam\SteamApps\username\portal\portal\mapsto play the map, run portal, go to bonus maps and click on chamber23. is this dose not work for some reason, open the d The underlying concept of this map is the use of physics objects with portals. This map is playable all the puzzles work 98% of the time (do to the conflicts between portals and the physics engine).

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