Portal: Prelude, as its name states it, is an unofficial prequel to the game Portal. 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, and 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...
This game is totally free. It offers a bit more gameplay hours than the original Portal, with 8 chapters, 19 test chambers, 48 challenges, 6 advanced maps, a brand new storyline and more than 400 lines of english speech with dozens of subtitles translations.
Ok, that's right, it's a kind of big surprise. After 114,000 votes, Portal: Prelude didn't win the ModDB's Mod of the Year Awards, but made it to the third place!Mar 2, 2009 News
This new version is shipped with more than 115 bug fixes, improvements and additions (since 1.0.0). We know everything's still not perfect, but we believe we put enough work in this mod and thus, this...Feb 1, 2009 News
Portal: Prelude 1.1.0 released! This new version is shipped with more than 80 bug fixes and additions, along with slightly easier first levels.Oct 30, 2008 News
That's it! Portal: Prelude is released! Thanks to FilePlanet and Planet Half-Life, you can now download the game one day before the official release date!Oct 8, 2008 News
Here we are, Day One. The trailer is up and running.Sep 15, 2008 News