The video says the demo was made using the Unity Engine, which means they took some Portal assets and made a small demo with them. They didn't take the full game and squish it onto the iPhone; what you see is probably the entire thing. There's no way the Source Engine is running on the 3G. Maybe the 3GS, but not the 3G.

In any case, I imagine trying to play Portal using touch controls would ruin the entire experience anyways. Just stick to playing it on at PC/console. [Touch Arcade via Kotaku]

There aren't any clear instructions detailing just how to build your own gun, but you're way too lazy to ever actually build a recreation. Luckily, if you're sitting on a small mountain of cash, you can go to the creator's site for any business inquiries. Apparently, Portal's developer Valve has ordered a model. And if you're willing to stand in line long enough, maybe you could score one, too.

See all of the build photos here: [GameDaily]

Sure, you might be worried that GLaDOS will trick you into thinking you're heading towards Six Flags or the bakery, all while directing you to drive into the gaping maw of an active volcano. But you've just got to keep telling yourself that it's just a voice on an otherwise-reliable Garmin Nuvi. It's actually not an official voicepack; it's a pet project of Ryan VanMiddlesworth. But if you own a Garmin Nuvi, you can go ahead and download it now. [Project Page via Engadget]