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.

Add download Report content Portal: Prelude 1.1.5 (complete installer)
Filename
portal-prelude-setup-1.1.5.exe
Category
Full Version
Uploader
NykO18
Date
Size
792.63mb (831,130,364 bytes)
Downloads
169,745 (21 today)
MD5 Hash
8f6a21a34553eef27ccfdbd4b26c4724
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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.

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Portal: Prelude 1.1.5 (complete installer)
Post comment Comments  (50 - 100 of 105)
Sputmint
Sputmint

792 MBs? Must be a basket of awesome!

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Splinesplitter
Splinesplitter

It surely is.

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WeltEnSTurm
WeltEnSTurm

I love this mod.
The original game should have looked more like this. (longer, harder)

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wataru8675
wataru8675

Just downloaded this today, and I made this account just so I could tell you that your easter eggs are the best I've ever seen. xDDD

Also, I think I've been more satisfied playing this game than I have the original. You get such a great sense of success after completing one of your seemingly impossible chambers. @_@

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kokis5
kokis5

FOR **** SAKE IT WAS 51 % AND IT AUTO CANCELED WHAT THE ******* HELLLL

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Cremat0r
Cremat0r

I really know why this has over 46.000 downloads.
EPIC MOD!
And I hope for you that you agree with me, if you do so, your business is appreciated!

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Splinesplitter
Splinesplitter

Holy crap, 6Mb/s peaked!!! **** yeah!

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schnizle
schnizle

WOW! Can't wait to start it, only about another minute left on the download

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urahara
urahara

:|
i was at 97%... AND IT CRASHED :'( what does a heart attack feel like...

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nosfer4tu
nosfer4tu

it feels like... like... HHHHHHNNNNNNNGGGGGGNGADsagdsUILYD UT asd....... <silence>

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builderman1q2w3e4r
builderman1q2w3e4r

Z0mG 792MB THAT MUST BE A HELL LOTTA AWESOME HHHHUUUUUUUNNNNGKEFCFvkecjfv5.... <silence> *gunshot* ooooh *falls on ground and dies and flooooooop* FLOOOOOOOOOOOOOOOOP

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grammernazi
grammernazi

my download is going at a whopping 2.76 kb/s and im not worried because that just means that the game is going to be 2.76 kb/s better when i play it

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ammd
ammd

Sorry but imo 1.1.5 sucks ***
1.1.1 too

1.1.0 was is best ever. :DD

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mnieyc
mnieyc

ooooooouuuuu my mother said cannot play this game

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cubetony
cubetony

Im sorry does that last comment seem a little weird

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henryscool429
henryscool429

only just found this mod! gonna spend tomorrow downloading, installing and playing XD haha can't wait, sounds so good.

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drummaniac28
drummaniac28

Gaaah I just downloaded this cause I loved the original and this looks F****** AMAZING but, it says I need a source engine to play it! I have the orginal on Steam, and also HL2 Deathmatch, so idk if those count, so please tell me if I need to buy a different Valve game to play this (I hope so, great excuse to get TF2 for PC :D)

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Pvt.Grif
Pvt.Grif

HOLY SH*T..

(Head Explodes with awsomness
lol

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GabwithCrowbar
GabwithCrowbar

<3333

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NeRvE_Relapse
NeRvE_Relapse

I Need Help My Game Doesn't Work It Didn't Show Up On Steam Game List And All I Can Do Is Un-Install It And Do The 4 Hour Re-Install Again.And Again.

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nannerpuss11
nannerpuss11

Computer: *cough cough* huge download size.Can't take the pain *shoots self in CPU with deagle*

Me: NOOOOOOOOOOOOOOO!WHY!NOW I WON'T ENJOY PORTAL PRELUDE!

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Rashaverak
Rashaverak

Ok so I've downloaded & Installed Portal Prelude from here, it's in steamapps>sourcemods>portal prelude.
And there's no .exe in the folder for Steam to recognize, eve after restarting Steam, and my comp itself. Any suggestions? :&

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AmaroqDricaldari
AmaroqDricaldari

Did it replace your Portal files, or did it include the required files?

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Vortagaunt238
Vortagaunt238

Well it wasnt cave johnson i think it was abby or chell johnson

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Vortagaunt238
Vortagaunt238

Is this even a valve product??!!

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Radnartjie
Radnartjie

downloading mod now ....

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AmaroqDricaldari
AmaroqDricaldari

And you use Portal 2 Textures? I hope you use Portal 2 content on some of the stuff. Weighted Pivot Cubes look cooler than Weighted Storage Cubes, the Portal 2 Doors look better than the Portal Doors, the buttons in Portal 2 light up when activated, and Personality Cores look ALOT better in Portal 2. Take Wheatley, for example.

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red_wesley
red_wesley

The installer is one of those that take over 1/2 an hour to open. :( Some do this, most don't. This is one of those that do...

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Delta301
Delta301

Amazing mod. I love the fact that you thought Portal 2 was going to be a prequel. If that hadn't happened, then you may never have finished this, and we might never have had such an awesome prequel. Valve should consider making this official.

There is only one thing that this mod is missing, and that's Caroline :D

Also depending on how far back this mod actually goes, Mr Cave Johnson himself

Amazing mod.

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halo22222q
halo22222q

I cant beleive this slipped right past me

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Chillius
Chillius

i remember i was playing it on 2010 and then my steam updated and i lost all my mods so i am redownloading

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Hmoud999
Hmoud999

First You Need Play: Portal Prelude Then Portal 1 Then Portal 2
Portal Prelude = Portal 1 = Portal 2

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aobigael
aobigael

I am wondering, can we play this mod with Portal 2 or do we need portal 1?
Cause I have portal 2 on PC, but the first one on Xbox 360...

Edit: If I need it, dangit, 7 hours of download for nuts...

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LordOfCrap
LordOfCrap

This Mod... ThIS MOD! Wow. Soo Good. I played it years ago and I am going for it again. No cheating.

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LordOfCrap
LordOfCrap

Portal Prelude, Portal 1, Portal 2, Portal 3: Thinking with time machine

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Guest
Guest

an hour of downloading to just see a white screen and sounds thanks for the waste of my time! :)

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TheUnbeholden
TheUnbeholden

Just edit the gameinfo.txt with whats listed in the description.

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