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.

Report abuse Portal: Prelude 1.1.5 (complete installer)
Filename
portal-prelude-setup-1.1.5.exe
Type
Full Version
Uploader
NykO18
Date
Feb 2nd, 2009
Size
792.63mb (831,130,364 bytes)
Downloads
161,533 (1 today)
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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).


Portal: Prelude 1.1.5 (released 2009-01-29)

* Added: german translation (subtitles only)
* Added: czech translation (subtitles only)
* Added: chinese translation (subtitles only)
* Added: unofficial slovak translation (see portalprelude.com)
* Fixed: italian subtitles corrupted by additionnal quotes (thanks to Matteo Piazza)
* Fixed: russian subtitles corrupted by additionnal quotes (thanks to Matteo Piazza)
* Fixed: korean subtitles corrupted by missing tag (thanks to Nevets_Look)
* Fixed: portuguese subtitles corrupted by missing tag (thanks to Nevets_Look)
* Fixed: typos in spanish subtitles (thanks to Siegfried Anderson)
* Fixed: test chamber 6 not reloading when failing
* Fixed: difficulties to fire portals through some of the white holes
* Fixed: ability to go back when reaching the end of chamber 12
* Fixed: time challenge for chamber 15 was a step challenge
* Fixed: in a rare case glados was still attacking when shutted down
* Fixed: ability to go under the elevator before it came back in chamber 18
* Fixed: flying ghost chair in aperture laboratories
* Fixed: random crashes should disappear, let's hope some others won't appear
* Fixed: glados laser starting too fast, increased the delay
* Fixed: a few soundscape problems
* Fixed: credited the correct people for the correct stuff
* Fixed: missing projector model textures
* Fixed: music played during the second boss-fight not playing correctly or not at all
* Fixed: several cubemap (reflections) visual glitches
* Fixed: ability to open the door to the three ballcatchers in level 19, by only using a cube
* Fixed: lighting artifacts in the last levels
* Fixed: GlaDOS randomly stops attacking in the second round
* Fixed: subtitles activated by default when the mod is launched for the first time
* Fixed: hundreds of trivial glitches and tiny stuff everywhere in the levels
* Added: new aperture science laboratories logos
* Added: simpler and clearer signage in the first levels
* Added: maybe one, two or three new easter-eggs?
* Added: the correct graph and soundcache files
* Added: new lighting effects near metal grates
* Added: new intro sequence (vault lift)

Portal: Prelude 1.1.0 (released 2008-10-29)

* Added: dutch translation (subtitles only)
* Added: finnish translation (subtitles only)
* Added: hungarian translation (subtitles only)
* Added: italian translation (subtitles only)
* Added: korean translation (subtitles only)
* Added: portuguese translation (subtitles only)
* Added: russian translation (subtitles only)
* Added: spanish translation (subtitles only)
* Fixed: portals not fizzled when you handed back your portalgun
* Fixed: installer problems (mostly with Windows Vista)
* Fixed: huge freezes and lags when GlaDOS is started
* Fixed: morality core going through a grate in the last level
* Added: a toggle mode to the BTS button in test chamber 19
* Fixed: camera won't fall in test chamber 15
* Fixed: ability to go inside observation rooms using an engine glitch
* Fixed: finishing test chamber 6 could lead to Mike saying you failed
* Fixed: Erik saying "euros" instead of "dollars"
* Fixed: ability to go inside the box dispensers using an engine glitch
* Fixed: advanced chambers/challenges still locked when finishing the game
* Fixed: autosaves not correctly activated
* Added: autosaves on challenge start
* Added: autosaves after long speeches
* Fixed: player could get stuck under elevators
* Fixed: challenge 15 won't record scores
* Fixed: challenge 17 won't record scores
* Fixed: box dispensers can drop more than one cube
* Fixed: typos in french subtitles
* Fixed: typos in english subtitles
* Fixed: portal fizzler in test chamber 17 gives a cube for a camera
* Fixed: missing faces resulting in visible outside of the level
* Fixed: non-solid door in test chamber 3
* Fixed: non-solid door in test chamber 4
* Fixed: cubes can get blocked in the dispensers tube
* Added: an escape path in test chamber 9
* Fixed: glass panel can be broken with a chair in the aperture laboratories
* Fixed: cube can be lost in the orbs room in test chamber 19
* Fixed: cube can be lost before the pit in test chamber 19
* Added: a cube dispenser in test chamber 14
* Added: an alternative path in test chamber 15 (for the challenges)
* Added: a delay when turrets appear in test chamber 8
* Fixed: bogus elevator in test chamber 10
* Added: a distraction in the turrets room in test chamber 11
* Fixed: radio song does not stop when the radio is destoyed
* Fixed: moving a few autosaves and areaportals to prevent the game from crashing
* Fixed: improving lipsyncing but it's still random as faceposer keeps corrupting our sounds
* Fixed: ballcatchers can be activated with any thrown object
* Fixed: scorpions' song replaced by four variations of still alive
* Fixed: door won't open in the corridor at the beginning of test chamber 18
* Added: hints at the end of test chamber 18
* Added: a disclaimer when the game starts
* Added: a ledge for the first jump in test chamber 2
* Fixed: turrets fire too quickly in test chamber 1
* Added: a ledge for the fling in test chamber 3
* Fixed: lunch bag model sounds like metal
* Added: english part to the commentary, to point out that there's subtitles
* Added: new "directional sign" textures for test chamber 19 BTS area
* Added: hints under the stairs in test chamber 19
* Added: another path to get to the BTS area in test chamber 19
* Fixed: particles and light color of disintegrators
* Fixed: particles color of "only-portals" fizzlers
* Fixed: rework a few textures for the BTS/maintenance areas to look less old
* Fixed: clean and optimize level geometry
* Added: missing challenge records for test chamber 15
* Added: missing challenge records for test chamber 18
* Added: missing challenge records for test chamber 19
* Fixed: GlaDOS force field insta-kills too randomly and too often
* Fixed: bogus NPC animations
* Removed: alternative solution for test chamber 4
* Added: space between "only-portal" fizzlers and disintegrators in test chamber 15
* Fixed: snoozing man is not snoozing
* Added: NPCs in some empty observation rooms
* Fixed: fizzler in test chamber 15 is destroying the energy orb
* Fixed: too many letal turrets in test chamber 15
* Added: hints in the 4-turrets room in test chamber 17
* Added: a glass panel to see the rotating wall in test chamber 17
* Added: missing tubes in box dispensers
* Added: crosses on wedge shaped platforms in test chamber 19
* Fixed: GlaDOS stops attacking after her second attack in the second round
* Added: restored stairs in the BTS/maintenance area in test chamber 15
* Added: clipping in most of the stairs to avoid view shaking
* Fixed: in a rare case, the cube isn't respawned in test chamber 17
* Fixed: in a rare case, the cube isn't respawned in test chamber 18
* Fixed: overlapping blocks in test chamber 19
* Fixed: at the end, the new menu doesn't show up if the console if visible

Portal: Prelude 1.0.0 (released 2008-10-10)

* Initial release

Preview Image
Portal: Prelude 1.1.5 (complete installer)
Post comment Comments  (50 - 99 of 99)
REENIGAV
REENIGAV Dec 6 2009, 7:42pm says:

this mod is awesome!! thanks to upload!

+2 votes     reply to comment
Guest
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Sputmint
Sputmint Dec 28 2009, 5:13pm says:

792 MBs? Must be a basket of awesome!

+4 votes     reply to comment
Splinesplitter
Splinesplitter May 15 2010, 11:01am replied:

It surely is.

+1 vote     reply to comment
WeltEnSTurm
WeltEnSTurm Feb 26 2010, 1:47pm says:

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

+1 vote     reply to comment
wataru8675
wataru8675 Mar 27 2010, 9:57pm says:

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. @_@

+1 vote     reply to comment
kokis5
kokis5 Apr 22 2010, 2:58pm says:

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

-1 votes     reply to comment
Cremat0r
Cremat0r May 15 2010, 4:28am says:

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!

+1 vote     reply to comment
Splinesplitter
Splinesplitter May 15 2010, 11:00am says:

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

+1 vote     reply to comment
schnizle
schnizle May 15 2010, 3:12pm says:

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

+1 vote     reply to comment
urahara
urahara May 20 2010, 1:35pm says:

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

+2 votes     reply to comment
Nawwx
Nawwx May 24 2010, 9:38am replied:

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

+3 votes     reply to comment
builderman1q2w3e4r
builderman1q2w3e4r May 26 2010, 6:43pm says:

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

-1 votes     reply to comment
grammernazi
grammernazi Jul 2 2010, 12:57pm says:

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

+1 vote     reply to comment
ammd
ammd Jul 6 2010, 7:47pm says:

Sorry but imo 1.1.5 sucks ***
1.1.1 too

1.1.0 was is best ever. :DD

+1 vote     reply to comment
mnieyc
mnieyc Jul 22 2010, 9:23pm says:

ooooooouuuuu my mother said cannot play this game

+1 vote     reply to comment
cubetony
cubetony Aug 7 2010, 5:05pm replied:

Im sorry does that last comment seem a little weird

+1 vote     reply to comment
henryscool429
henryscool429 Aug 9 2010, 5:03pm says:

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

+1 vote     reply to comment
drummaniac28
drummaniac28 Aug 15 2010, 2:47am says:

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)

+2 votes     reply to comment
Pvt.Grif
Pvt.Grif Sep 6 2010, 1:27pm says:

HOLY SH*T..

(Head Explodes with awsomness
lol

+1 vote     reply to comment
GabwithCrowbar
GabwithCrowbar Oct 8 2010, 4:17am says:

<3333

+1 vote     reply to comment
NeRvE_Relapse
NeRvE_Relapse Oct 14 2010, 12:22am says:

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.

+1 vote     reply to comment
nannerpuss11
nannerpuss11 Nov 6 2010, 11:52am says:

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!

+2 votes     reply to comment
Rashaverak
Rashaverak Nov 10 2010, 12:35am says:

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? :&

+1 vote     reply to comment
AmaroqDricaldari
AmaroqDricaldari Apr 3 2011, 9:54pm replied:

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

+1 vote     reply to comment
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Vortagaunt238
Vortagaunt238 Feb 15 2011, 10:14pm says:

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

+1 vote     reply to comment
Guest
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Vortagaunt238
Vortagaunt238 Feb 15 2011, 10:16pm says:

Is this even a valve product??!!

+1 vote     reply to comment
Radnartjie
Radnartjie Mar 30 2011, 5:08am says:

downloading mod now ....

+1 vote     reply to comment
AmaroqDricaldari
AmaroqDricaldari Apr 2 2011, 10:50pm says:

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.

+1 vote     reply to comment
red_wesley
red_wesley May 12 2011, 9:01pm says:

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...

+1 vote     reply to comment
Delta301
Delta301 Jul 21 2011, 9:21am says:

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.

+1 vote     reply to comment
halo22222q
halo22222q Aug 2 2011, 12:21pm says:

I cant beleive this slipped right past me

+1 vote     reply to comment
Chilius03
Chilius03 Aug 19 2011, 4:54pm says:

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

+1 vote     reply to comment
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Hmoud999
Hmoud999 Jun 27 2013, 8:50pm says:

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

+1 vote     reply to comment
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aobigael
aobigael Jul 31 2013, 1:04am says:

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...

+1 vote     reply to comment
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LordOfCrap
LordOfCrap Jul 2 2014, 5:53pm says:

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

+1 vote     reply to comment
LordOfCrap
LordOfCrap Jul 2 2014, 5:57pm says:

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

+1 vote     reply to comment
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Icon
Portal Icon
Platform
Windows
Game
Portal
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Official Page
Portalprelude.com
Release Date
Released Oct 8, 2008
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MD5 Hash
8f6a21a34553eef27ccfdbd4b26c4724
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