Another.Test.Subject
Map Pack for Portal
This map pack is designed to be a moderate challenge for players who have played Portal. The initial puzzles are designed in such a way that they don't require much thinking and players can skim through them, experienced players might find them a bit boring. The difficulty ramps up significantly midway through the map pack, with the later puzzles requiring thinking and at times quick maneuvering and precise timing. All the puzzles contained in this map pack are doable without the use of cheats or exploits.
Features:-
a) 15 completely new test chambers.
b) Optimized and fully detailed maps to make them feel more Valve like.
c) New puzzle elements like player controlled moving platforms, laser field, etc.
d) An explosion filed easter egg. (Good luck finding it)
File Name: ats_map_pack.zip
File Size: 82.32 MiB
Click here to download Another.Test.Subject
Awesome... I'll play this immediately 
useful tools and stuff here on TWP 
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Yes yes yes, the original is not lost and forgotten after all. Will play! <3
The more you give, the less appreciated it will be received.
Just played through a fair chunk of it (up to the 10th or 11th chamber I think). I have encountered a few bugs here or there, most of them small - for example, portals can be placed behind catchers and launchers in most chambers. But there was one big one.
In Chamber 08, the button that opens the exit door got stuck down - there was nothing on it, but it was activated. Seeing this as a stroke of good fortune, I proceeded to the next room - only to eventually realize that the pellet launcher wasn't launching in that room. I decided it was broken so I noclipped to the next room, where I encountered the same problem.
I then realized that outputs weren't being fired because I hadn't activated everything in Chamber 08.
So my advice to you would be to check the trigger for the button in Chamber 08.
But other than that, it was really fun. Levels were well designed and challenging (the ones around the Chamber 8+ mark more so), and it ran very well. I hereby declare it worthy of 5 stars.
Also got button stuck in chamber 8, likewise figured out that all needed to be activated for rest of chamber. Some of the times were extremely short to open the door to the pellet catcher - almost quit there was taking so long.
Had to break after chamber 11, will return later and finish. Great P1 map set....sterile clean halls and pellets...ahhhh P1....
Edit 1: All the chambers were very challenging, some more had such short times to execute that they seemed to me nearly futile. the last few chambers were a bit repetitious of the earlier hard chambers, similar hard timings and balls that evaporated if one step was missed - got frustrating quickly. In 14 I got tired of the 3 ball catchers in the ceiling and the short times so I had to resort to fire_energy_ball... only to face massive turret fire getting out.
Still quite an achievement to put together all these chambers - impressive - have to give a 5 for that alone....well done.
Thanks everyone for the feedback. As for the chamber 8 bug I don't know how it crept in. I heard about it before by someone else but I thought it was case specific as it never came up during any of the play test even until the final one.
I will look into it ASAP and post the fixed version.
I then realized that outputs weren't being fired because I hadn't activated everything in Chamber 08.
So my advice to you would be to check the trigger for the button in Chamber 08.
I was trying to search for the bug that you guys mentioned but I couldn't find it. Can anyone of you post a small video or screenshots of the bug or mail it to me? It will be really helpful.