Uploaded May 2015 | Updated September 2026, 1 day ago

---

"4e 6f 74 20 73 6f 20 66 61 73 74 21 20 54 68 69 6e 6b 20 61 62 6f 75 74 20 74 68 69 73 2e"
- GLaDOS

This is my attempt, to introduce the style from the first- and thirdperson puzzle-adventure game "The Talos Principle" leak into the Portal 2 Perpetual Testing Initiative Editor (PTI-Editor), so that people, who have not bought it, can - almost - play it within their Portal 2 game experience.

All these tests are 100% built by me with the PTI-Editor and some puzzles are "copied" from the original game and some are made up by myself.

You can download and play any of these maps by your own and I have even created a complete collection in the steam workshop, so you can just press one button, to get installed all of the testchambers in your Portal 2 queue.

These are official walkthroughs, but when you got another solution to any of these tests, let me know, so I can improve the puzzles!

Here are the official solutions to all testchambers:
1 to 11 → youtube.com/watch?v=Q0zsCwC8RMQ
12 to 22 → youtube.com/watch?v=4fJBAEMhSF4
23 to 33 → youtube.com/watch?v=QROssPQubAo

Here is the complete collection:
steamcommunity.com/sharedfiles/filedetails/?id=429135756

And here are all the tests listed in order with the direct link to their steam workshop page:
Test 23 (0:00): steamcommunity.com/sharedfiles/filedetails/?id=438413995
Test 24 (2:30): steamcommunity.com/sharedfiles/filedetails/?id=438729003
Test 25 (5:00): steamcommunity.com/sharedfiles/filedetails/?id=439348863
Test 26 (9:45): steamcommunity.com/sharedfiles/filedetails/?id=441649280
Test 27 (12:50): steamcommunity.com/sharedfiles/filedetails/?id=442093461
Test 28 (19:50): steamcommunity.com/sharedfiles/filedetails/?id=442542764
Test 29 (21:20): steamcommunity.com/sharedfiles/filedetails/?id=449092446
Test 30 (23:30): steamcommunity.com/sharedfiles/filedetails/?id=446035422
Test 31 (29:40): steamcommunity.com/sharedfiles/filedetails/?id=446556884
Test 32 (33:13) : steamcommunity.com/sharedfiles/filedetails/?id=446635169
Test 33 (36:20): steamcommunity.com/sharedfiles/filedetails/?id=447758585