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.

Description

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 version should be considered final (except if something really bad happens). Please note because of steampipe there is a simple fix that you need to make to gameinfo.txt which is the same for every portal mod.

Preview
Portal: Prelude 1.1.5 (complete installer)
Comments  (0 - 50 of 142)
Tron619
Tron619

ZOMG thanks
ZOMG I'M GONNA EAT A CARROT

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InStars
InStars

i wish i had a carrot to eat...

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ChrisBryant
ChrisBryant

I wish I had a black forrest cake to eat...

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Marvin.Damstra
Marvin.Damstra

you can't have it, it's a lie

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K00PD4WG
K00PD4WG

good thing the cheesecake isnt :D

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Guest
Guest

Really

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Tezmatic
Tezmatic

Wow i feel old seeing these comments

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Ballads
Ballads

(buried)

it doesnt work!

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NuBiTo
NuBiTo

lol why is it burried? wat so bad about eating carrot. He's just being random. thats all

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NeRvE_Relapse
NeRvE_Relapse

Because Of Too Many Negeative Votes lol

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Chocolate-Helicopter
Chocolate-Helicopter

this comment is old

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Portal124
Portal124

yeah your comment is old.

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Guest
Guest

HA, Your comment's old

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drunkenheadcrab
drunkenheadcrab

Damn this comment is so old

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Guest
Guest

too bad your comment is also old :/

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Guest
Guest

Wow, this comment's so old!

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Guest
Guest

Damn your comment is so old

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Guest
Guest

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Guest
Guest

now your comments old

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Guest
Guest

no u

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Guest
Guest

now your comment's old

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Guest
Guest

holy crap it is old :)

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bryceyj10
bryceyj10

your comment is old also I like beans

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Guest
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Guest
Guest

Hello and again welcome to the Aperture Science Enrichment Center.

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Supermariogirl
Supermariogirl

Coincidentally I was eating carrots while reading this. Small world.

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UACmarine208
UACmarine208

i hope this was before the cake was a lie XP

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ZedoMann
ZedoMann

There was no such time...

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CyberAltair
CyberAltair

Damn, I really wanted to play this but with my internet connection this will take a lot of time =\

Isn't their as possibility of putting it in a .rar file in the future?

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matthijs186
matthijs186

They did, check it out!

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ContentRobby
ContentRobby

how do you find the file to play it I downloaded it for like 1 hour now i cant find where to play it please help mod db.

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sudoku424
sudoku424

First, you must go to where you downloaded it to and then use that to install the game. Then, Steam must be restarted(or just started, if it wasn't running when you installed Portal Prelude), and then it will be in the games list of Steam.

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pie32
pie32

put the download under steam/steamapps/sourcemods then it will be in your steam game list as a third party mod :D

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matthijs186
matthijs186

that's right, a third party mod!!

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Portal124
Portal124

You run it...it is an installer lol.

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Lopper
Lopper

it must of took a long time to upload a file THAT big XD

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Ballads
Ballads

sorry false alarm :"

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randosity42
randosity42

installer at 1 percent...lol

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Killer_man_1996
Killer_man_1996

ME TOO... :(

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SkyJack3R
SkyJack3R

This Prelude version looks good :o)
I'm gonna check this out ^^

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maxpayne05
maxpayne05

hi guys is there out a tutorial to install this ?

Thanks

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Croco15
Croco15

GODLIKE!

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GhettoGarden1
GhettoGarden1

mmm carrots

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Persnoody
Persnoody

Hmmm >downloaded >installed but for some reason steam doesn't recognize this as a game. Anyone got any ideas? I really want to play this game.

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NuBiTo
NuBiTo

are you sure you place it in the right folder? Do you have the orange box?

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