So, Portal looks all neat, cool, and fun. Yeah. It sure was fun, you know, when it was called Narbacular Drop.

Confused? http://www.nuclearmonkeysoftware.com/narbaculardrop.html)

Just play it. It's freeware, and the guys who made it got FREAKIN' HIRED BY VALVE!

So, here we talk about Portal, and of course, Narby.

That's pretty awesome, I can't wait until the Valve game comes out, it'll be way more polished.

Yeah, I've found most people will spend the first 30 minutes/40 hours of Narbacular Drop trying to create time paradoxes/weird portal zones/neverending hallways. It's such an innovative engine and I'm honestly kinda glad Valve is adopting it and making an advanced version. As much as Narby is nice, you can't jump.