Think with portals, make your own Portal 2 level now

Valve has released its Portal 2 Authoring Tools, and if you have a PC, you can start building your own test chambers now.

The software is free, and you locate them in the “Tools” section of your Steam account. It’s quite a sandbox to play in, too, with all of the game’s assets — including sounds and models — are available for use. The tools are currently in beta, so if you spend hours building something and the software crashes and you lose it all… let Valve know, and they’ll fix it. Also, sucks for you.
 
Sounds like fun, if not a bit of a time sink. But for someone with a creative mind and some spare hours on their hands, have at it. I look forward to cracking the codes of your near impossible test chambers.

Authoring Tools Beta Release [Think With Portals]