Time Arch
Interesting puzzle, did you get the idea from this?
This was made a while back before Portal 2.
This was made a while back before Portal 2.
I have never seen that before, thanks for showing it to me.
However, when I made this I assumed that it had been done before in at least one other game or movie.
AMD Turion 1.6 GHz, 2 gigs RAM, and an ATI RADEON XPRESS 200M
"LOL I Don't Meet Min Specs!"
On the strength of that snippet alone, I can't wait to play a fleshed out mod with the concept. The mechanic is neat, but the execution and signalling is excellent - great work.
(can people get over the 'who thought of it first' crap 
?
Everything's a remix, and some remixes are awesome like this one)
Peem
This was made a while back before Portal 2.
I bet we can go back even more, i.e. to Undying.
Big +++ from me. I love this concept, and cannot wait to see what you come up with.
Honestly, I'd love it to look like the original design from 44 years ago!
Wow, that idea is freakin' amazing. If you don't mind, Domtech, do you mind if I use this idea in a campaign/mod I'm working on? The name too? I love it 
But can you make it in the size of a tardis?
This was a cute little map but could have been alot more. It's kind of gimmicky and the actual test chamber doesn't make sense. It bothers me when people map destroyed areas so that the puzzle solution relies on the destruction rather than the destrucion being a coating on top of the puzzle. Yours involves time travel as a nice story twist, but why would glados/humans have designed the puzzle this way? Would they have known that the destroyed version would exist and would allow the solution? It seems somewhat paradoxical for aperture to design a puzzle that relies on the puzzle being broken to be solved (i.e. broken glass). Still, I enjoyed it.
Would you consider releasing your Quantum Arch as a parefab, so others can use it and have it remain consistently yours 
"Such monstrous sucking-constructions aren't built within one afternoon"