Portal: Prelude, as its name implies, is an unofficial prequel to the game Portal. Its story revolves around the pre-GlaDOS epoch way before she was plugged in. Back then, test subjects were still monitored by real Aperture Science employees, a tedious, dull, and repetitive job. One of the reasons why they decided to build a great artificial intelligence that could both replace them for these complex tasks and also take responsibility for many other functions within the complex while competing with Black Mesa's superiority. All employees of the Aperture Science complex are now eagerly awaiting GlaDOS. A little too eagerly maybe, as the unfolding 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 dialogue with dozens of subtitles languages.
This mod by the Portal: Prelude Team is the prequel to the Portal game. Features include more gameplay hours than the original game, 8 chapters, 19 test...
This mod by the Portal: Prelude Team is the prequel to the Portal game. Features include more gameplay hours than the original game, 8 chapters, 19 test...
All the files needed to make Portal: Prelude run. This version is exactly the same than the "installer" version except that it works better for Mac OS...
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...
This mod by the Portal: Prelude Team is the prequel to the Portal game. Features include more gameplay hours than the original game, 8 chapters, 48 challenges...