Why ?
In January 2008, I was searching for a new project. Portal was out since four months, and still, no-one had already did something really serious around it. I was following a lot a communities, seeing a lot of independant releases, but no mod and no serious story arc. This I why I decided to launch this project.

How ?
At start, the project was rather insignificant. It was not supposed to be a mod (modification of a game), but just a succession of test chambers, without any real logic between each of them. I had no goal, I was just making maps as I saw it. And finally, when I reached a dozen of test chambers, I realized that I would be a shame to waste all my work by only releasing yet another map pack without any real story. This is where I began to write a whole new story and decided to follow the famous belief that prequels are somewhat popular recently.

What ?
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, 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...

Who ?
My goal was to make it a personnal project, without telling anyone about it. I wanted to surprise everyone by releasing a quality, polished and fully finished game, offering roughly the same amount of playtime than Portal. As months passed, I had more and more difficulties to keep working regularly on it. In real life, I'm both a student and an employee, and that didn't left me a lot of time to work on the game. This is where I decided to ask for some help, mainly from Jérémy "Capitaine Mousse" Barbe, who helped me by making four of the nineteen test chambers while I was working on the final level. Marc "Moroes" Bidoul helped me too, by making a few 3D models and textures.

How long ?
Eight months. Not eight month of continuous work of course, but eight month with some days filled with dozens of hours of hard work. I worked on the nineteen test chambers for 3 to 4 months, followed by 2 months on the final level, and 2 months of tests, debug, and polishing (interfaces, voices, commentaries, etc.). I must confess that it took me a lot more time than I initially thought, mainly because I had exams and work to do on behalf.

And after ?
In June 2008, I learned as everyone else that Valve was working on an official prequel of Portal. I must say that I was mostly the only guy on Earth not really happy by this announce. So, I decided to work twice as hard to release my version way before Valve's one. I hope that they will not take it too personnally, because mine was in development 5 months before their announcement.

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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! Surprinsigly enough, we also managed to beat the most acclaimed mods of 2008, including nearly every mod that got into Steam during the year.

  1. Project Reality (Battlefield 2)
  2. Zombie Panic: Source (Half-Life 2)
  3. Portal: Prelude (Portal)
  4. First Strike (Battlefield 2142)
  5. Zombie Master (Half-Life 2)
  6. Pirates, Vikings and Knights 2 (Half-Life 2)
  7. Eternal Silence (Half-Life 2)
  8. Age of Chivalry (Half-Life 2)
  9. Stargate Empire at War (Starwars Empire at War)
  10. Half-Life 2: Wars (Half-Life 2)

I must say that I'm really happy with the results, it's kind of the best place ever for a little mod like ours that grew up rapidly from nowhere with a really small team but a really big motivation. It wouldn't have been fair to finish first or second regarding the amount of work and devotion put into some of the mods out there. Some of them who recreate everything from scratch and build something during years with sometimes hundreds of people. That's why I'm happy to be third!

I must say that our little team is quite proud of this result! After all, it proves that even if we crossed a terrific jungle of insults, harsh criticism and mockery, we managed to please the people at which this mod was first aimed: all-time Portal fans, hardcore challenge-looking players and a few of them who thought Portal: Prelude was cool enough to buy Portal once and for all (no joke here, I could cite you some e-mails I received).

Thanks to all our fans, to all the people who helped us and tried to help us in any way (e-mails, voices, forums, scores, bugfix, etc.), and thanks to all the people who sent us feedback via e-mails, comments, discussion boards or our forums. Thanks for the hundreds (maybe thousands) of e-mails to tell us your experience, your disappointements and your best moments. We couldn't reply to everyone (even if I tried to reply to at least 70-80% of them), but I can assure you we read everything.

Check our "meet the team" page to see all the people who really helped us.

Portal: Prelude 1.1.5 released!

Portal: Prelude 1.1.5 released!

News 13 comments

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...

Portal: Prelude 1.1.0 released!

Portal: Prelude 1.1.0 released!

News 29 comments

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.

Portal: Prelude Released!

Portal: Prelude Released!

News 26 comments

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...

Day One : The Trailer

Day One : The Trailer

News 26 comments

Here we are, Day One. The trailer is up and running.

Add file RSS Files
Portal: Prelude 1.1.5 (archive version)

Portal: Prelude 1.1.5 (archive version)

Full Version 31 comments

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...

Portal: Prelude 1.1.5 (complete installer)

Portal: Prelude 1.1.5 (complete installer)

Full Version 92 comments

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...

Comments  (0 - 10 of 378)
ConfusedAF
ConfusedAF

Yo wtf i just downloaded 1.1.5 and when i try to play it i get a blank white screen with some noises of a guy talking to his baby or something. How do i fix this?

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Guest
Guest

I was hoping to play this... then I did and it's just terrible. There is no story (certainly not about the premise of the game) and it's just a bunch of maps constructed to make you die. They are anything but puzzles. 1/5 is my rating, 1 is for the synthetic voices and creativity.

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ghostings
ghostings

A lot of the story content is actually in the last level, I can imagine you haven't gotten that far.

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ghostings
ghostings

Been playing the advanced maps, I'm not enthralled. Most of them are just speeding up your actions in previous maps. Even worse, some maps want you to depend upon the randomness of bouncing orbs. It feels like the advanced maps only seem to test your knowledge of exploits and your reflexes, none of the puzzles took me anytime to actually figure out what to do.

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Guest
Guest

HOW TO INSTALL?

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ConfusedAF
ConfusedAF

click 1.1.5
press download
wait
restart steam
boom, it's in your library m8

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◆DaimeneX◆
◆DaimeneX◆

I remember playing this when it first came out. It took me 6 ******* years to realize voice acting was a voice synthesizer.
It was to freaking professional for a synthesizer. Now that I listen to this AND then I listen careful enough I can hear that its a program.
Good job on that.

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Chocolate-Helicopter
Chocolate-Helicopter

i always thought they sounded...off

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wandatokiozo
wandatokiozo

Do i need HL2 to play this? I only have Portal.

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zadwon
zadwon

to difficult. why on earth are the mods so much harder then the actual game itself???

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8.7

691 votes submitted.

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Highest Rated (5 agree) 7/10

It must be admitted that if you take nothing else from this mod, its sheer scale is quite exceptional. With new characters, voicework, puzzles and approximately double the length of the original portal (not to mention its difficulty in places) it is hard to den the dedication and hard work that has gone into this mod. The storyline is fairly solid – although I expected the malice of on of the observers to continue – which is impressive and a testament to what can happen if a mod team sit down…

Nov 5 2010 by newnowmusic

Lowest Rated (8 agree) 3/10

If I were to give Portal: Prelude any credit, I'd say it was very ambitious, and I'd congratulate the developer for finishing it. However, the mod is not entertaining. It has terrible voice acting for one, because the creator himself admitted he could not be bothered to find actual people. In addition to terrible voice acting, the characters that need the voices are all very badly written. They have an unecessary amount of malice for the player; while that was funny in Portal, it lacks any semblance…

Jan 17 2011 by Darkurai

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