http://store.steampowered.com/freeportal/

Finished the game yesterday, and I'm pretty ashamed it took me this long to play it haha. It's easily one of the best games I've ever played. It's totally not what I was expecting it to be, it was funny, innovative, and often unpredictable. Anyway, this is old news to 90% of the world, but I'm glad I'm in the loop now.

Good timing though with Portal 2 coming down the pike.

Of course this has been long-awaited by those already aware of the gospel of the companion cube.