To install unzip file and place map files into your folder named
Steam\SteamApps\username\portal\portal\maps
to play the map, run portal,go to bonse maps and click on chamber22. is this dose not work for some reson,open the deveThis map is 100% playable all of the puzzles work. There however is a bug at the beginning of the advanced map if you try to jump in after the cube.
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