Calm down nerds, Portal is not availble for the iPhone and it probably won’t ever be. What you see here is one level remake being demo’d on the iTouch, which was made by using Unity Engine (integrated authoring tool for creating 3D video games or other interactive content such as architectural visualizations or real-time 3D animations.). It’s just a cool demo that gives iPhone/Portal fans like me a hard on. The iPhone/iTouch hardware wouldn’t even come close to running the source engine. In addition, as cool as this is I can’t imagine playing portal on such a limited interface. The game requires some pretty precise movement and quick timing at points. Having your fingers hovering over the screen and blocking your view ensures epic failure.
source via gizmodo