WARNINGPSYCHOLOGICAL INSTABILITY IS NOT FOR THE EVERYMAN. In order to pass any room in Psychological Instability, you must have finished the main Portal campaign to the best of your ability. These tests require foward thinking.
AboutPsychological Instability is a custom Portal mapset by Jack5 featuring a custom soundtrack, some textures, a new voice-over, and rather tricky puzzles. Since 2014, only one map has been available, despite a second being buried deep in Jack5's folders. Now with the release of version 1.1 in 2017, this second, unfinished map has been made available to play, containing chamber 03.
Extract the contents of the RAR file into Steam\Steamapps\common\Portal\portal then open Portal's Bonus Maps section to find the Psychological Instability collection. The transition between maps is seamless, so picking Chapter 1 is recommended.
Original SoundtrackThe original soundtrack for Psychological Instability is out now and can be bought, but then again you could always cheat and grab the music from the sound folder. Not all of the songs from the soundtrack are in the current version of Psychological Instability.
Version Information pre-1.1
- v1.02: Bug fixes in first and second chamber. Songs from the original soundtrack added.
- v1.01: Bug fixes in first chamber. Second chamber released.
- v1.00: First chamber released.