Yep, I'm 100% serious. Right now, on my phone, is an alpha, proof-of-concept build of Portal. No, it's not official (it's definitely not supported by VALVe Software in any way), but it is tantalizingly awesome. Now, before you ask, we aren't going to link to the apk - it's from a pretty sketchy source. But if you look hard enough, you'll probably be able to find it out there in some of the darker corners of the web.

The thing is, you probably wouldn't want to play it, because there's actually not much to play. It's more proof of concept than anything, but it's a concept we very much like, and that basically seems to work - you listening, VALVe?

These screenshots are essentially the extent of the concept build - it doesn't go much further (you fall out of the bottom of the first elevator). Check out the video of the full level:

As you can see, it does pretty much work (the choppy FPS is caused by our recording app). The best part, though, is the quality of the graphics in this unofficial port clone (it was developed using Unity, and since Portal is not open source, "clone" is a more correct term). Everything looks pretty great (except the portals, they haven't quite figured that part out yet), and the controls work decently, too. Will this game ever get off the ground? It's hard to say - this is a Russian piece of software, so it's unlikely VALVe will be able to do anything to stop it, if development continues.

Obviously, you'll never see this on the Market or any other remotely legitimate app store, but the concept has us absolutely drooling. If a fly-by-night development team can get this far, we can't help but think VALVe hasn't already started to explore the idea, too.