Portal: Prelude, the fan created prequel to the blockbuster Portal, is now being offered up from Planet Half-Life and FilePlanet.
Its story revolves around the pre-GlaDOS epoch, even before she was plugged in. At this time, test subjects were monitored by real Aperture Science employees whose work was tedious, lengthy and repetitive. This is why they decided to build a great artificial intelligence that could both replace them in these difficult tasks, but also take responsibility for many other tasks within the complex and compete with Black Mesa's superiority. All employees of the Aperture Science complex are now eagerly awaiting GlaDOS. Maybe even a little too eagerly, as the upcoming events will tell...
The official release isn't for another day, but a 24 hour FilePlanet exclusive never hurt anybody. We'll have a mirror up once the exclusive period is up.

ekhm, torrent

Game is great, but not that easy

17 chamber is TOTALY EASY!!!!!!!

Probably the hardest thing I've ever seen in portal, and I've played quite a few custom maps and know quite a few tricks... the sickest thing about this tormenting game is that it actually has advanced 18th and 19th chambers! As if they weren't damn-near impossible already! I'll tell you what- anyone who can get through 19's long chute without at least 5 quicksaves/quickloads is a god. I scarcely believe it's humanly possible...

Great plot, but highly challenging. If you're not a pro you might want to bind a key to noclip to get around some of the hard parts, just to get to the excellent ending.

Overall this was an excellent mod, save for the terrible english voice acting, a few spots of clipping, and the almost ridiculously hard levels. If you're looking for some serious portal challenges though, it really doesn't get any better than this.