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Proto:Half-Life 2 (Windows)/September 26th 2003 Build

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This is a sub-page of Proto:Half-Life 2 (Windows).

How about a nice leek in this trying time?
This page or section details content from the October 7th, 2003 Half-Life 2 Leak.
Check the October 7th, 2003 Half-Life 2 Leak category for more pages also sourced from this material.
Hl2proto menu1.png
To do:
Add references for the background to the leak.

The September 26, 2003 build of Half-Life 2 was compiled more than a year before the game's release. It, along with the Source Engine's source code and several other Valve-related files, were leaked by Axel Gembe, a German hacker who had managed to get into Gabe Newell's account because of an easy-to-figure-out password and began collecting and monitoring what Valve was up to. When Valve discovered they'd been compromised in late September 2003, they cut him out. He shared the code and assets around with his friends, where they ended up in the hands of myg0t, who leaked the files.

Back in the day, this leak was a major black eye for Valve, not only for allowing themselves to be compromised in the first place (especially in such a way), but also for showing that the game was in no way complete four days prior to its original intended release date of September 30, 2003. Nowadays, it's more of a simple curiosity to poke around and explore.

The real gold here is the many unused and obsolete resources, ranging from textures to weapons to unique characters, that were still in the game's files when this build was leaked.

To do:
  • Add new info gained from emails. For instance, spire was confirmed to be some Arctic base, possibly the Weather Control location.
  • Several subpages describe different/interesting animations. Perhaps get GIFs of these animations on here?


So many subpages, so much content!

Hl2proto assassin1.png
Cut Enemies
So many cut enemies, so much space to document them.
Combine Enemies
Rough textures, lots of textures from old Civil Protection versions, and more!
Hl2proto classiczombie1.png
Alien Enemies
Look at all those old Classic Zombie leftovers!
Hl2proto physgun.png
Cut Weapons
Gordon Freeman's Missing Arsenal: A cautionary tale on proper gun storage.
Hl2proto cohrt1.png
Used Characters
Dr. Kleiner's old model, unused textures from earlier development periods, different Citizen faces, and more!
Hl2proto odell1.png
Cut Characters
NPCs that didn't survive.
Hl2proto hevsuit.png
Every item got changed between here and the final game. There are some removed items, too!
Hl2proto jetski1.png
Trapped in the Digger.
HL2ambient generic.png
Cut Audio
Full conversations by temporary actors, sound effects, the full monty.
Hl2proto splash.png
Cut Textures
Considering the state of this game, there is a ton of unused textures.
Hl2proto citadel consul 00 02 00.png
Environment Map Textures
The environment map textures contain images of several maps not in the prototype nor the final game.
Hl2proto doall1.png
Cut Models
The many, many props and misc. models that didn't make it into the final game.
HL2 e3 techdemo 6.png
Cut Maps
From early versions of final maps to E3 2003 presentation leftovers, this prototype has it all.

WC Mappack

Leaked with the prototype was a collection of .zip files known as the "WC Mappack". The .zip files contain over 1,000 .VMF files (the editable sources of a map), all at different stages of completion and dates, from mid-December 2000 to around mid-2003. When run through Hammer, most maps can be compiled but will be missing textures and models.

There are so many maps, it's impossible to list them all here.


A city-themed test map. This map was used in the (now lost) SIGGRAPH 2000 demonstration, and is the birthplace of the "GET YOUR FREE TV's!" meme.


One of the most, if not, the most well-known map in the entire mappack.

The Mystery of "Spire"

The WC Mappack contains an empty folder called "spire". No maps of this location have been found in the WC Mappack. Spire is also mentioned in oldtrans.txt and has its own skybox, suggesting development advanced enough for it to get a unique skybox. While its maps no longer exist, there are some hints as to what it would be.

Raising the Bar has a short story made by Marc Laidlaw, Half-Life 2's writer, about a battle for a location called "Weather Control" (or "Weather Station"). Weather Control is also listed as a location in an early game progression chart shown in Raising the Bar. According to the story, Weather Control would take place in a snowy environment. Raising the Bar's summary of the location says it would take place in the Arctic.

Inside oldtrans.txt are these texture listings:

spi_snow02a nature\snowwall004a.tga
spi_snow02b nature\snowwall003a.tga
spi_snow02c nature\snowwall001a.tga
spi_snow02d nature\snowwall002a.tga

"Spi" stands for Spire. Based on the textures' names, Spire would have been in a snowy environment, just like the Weather Station in the story.

Weather Control is the only location mentioned in Raising the Bar that does not have any material for it in the prototype nor the WC Mappack. Spire also lacks any connection with any locations mentioned in Raising the Bar. Also, Weather Control is the only snowy location mentioned in Raising the Bar that does not appear in the WC Mappack.


The root textures folder contains a text file called "oldtrans". Inside it is a list containing two sets of texture names. The ones on the right correspond with many textures in the prototype. The left set appears to be old names for the textures and some of the texture names are somewhat similar to how textures are named in Half-Life's WAD files.

oldtrans.txt also reveals that textures were named based on what location they were going to be used at one point. The locations are Urb (City 17), Vert (Vertigo, a cut skyscraper location), deep (Kraken Base, another cut location), hyp (Hyperborea, an old name for the cut Borealis), Waste (the Wasteland, which became the final's Coast and Nova Prospekt locations) and Spi (most likely Spire, see above). There are folders in the WC Mappack corresponding with these location names, but they are empty.

This text file appears to be an old leftover, as it lacks several of the locations seen in the prototype or Raising the Bar (such as the cut Air Exchange, Canals, and the Citadel) and some of the names are somewhat close to how Half-Life named its textures.

To read all of oldtrans.txt's content, see the sub-page below.


E3 2003 Demonstration Leftovers

The prototype contains almost all of the resources used in the E3 2003 demonstration that officially unveiled Half-Life 2. This includes maps, models, textures, audio, configs used to record and show gameplay footage, and even the demos used to record the footage seen in the videos. However, because of engine differences and issues with resources, most of these maps and demos are broken.

If playing the maps, the player must follow the way the E3 2003 reveal videos played them, or else the maps will break (even more, in maps that are already busted) because of scripting issues.

This prototype also has all of the assets from the scrapped E3 2002 reveal.

Proto E3 2003 Presentation
Hl2proto e3 techdemo06ingame.png Hl2proto e3techdemo 06video.png


The prototype's GUI is almost exactly the same as the GUI used in the initial Steam version of Half-Life. The differences are that the menu options are placed closer to each other in the Half-Life 2 prototype, the game's logo will change if moused over, the "servers" option and Steam logo on the right-hand corner in Half-Life is missing in the HL2 prototype, and the HL2 prototype console uses an early TF2 icon, while HL1 uses a small Steam logo as its icon.

Half-Life 2 proto Half-Life, Steam version
Hl2proto menu1.png Hl1 menu1.png
Half-Life 2 proto Half-Life, Steam version
Hl2proto menu2.png Hl1 menu2.png
Half-Life 2 proto Half-Life, Steam version
Hl2proto menu3.png Hl1 menu3.png

Hl2proto daysuntilrelease.png

When the console is open, the game will show the text "Source Engine 2 (build -4 days until 9/30/2003)" in the upper right-hand corner of the screen. 9/30/2003 refers to Half-Life 2's original release date, while the text to the left of it seems to be based on the date the prototype was compiled. Based on the state of this prototype, there was no way in hell they were going to hit that release date.

Unused/Broken Features


The prototype has barebones support for multiplayer. The player can create a listen server via the main menu, but the mode itself is quite buggy. The scoreboard uses a simple design that no Source game has ever used.

The menu itself lets the player start a multiplayer game on any map, complete with functioning AI. It also has tabs for game and CPU player options, but the game tab shows nothing and the CPU player options only has an empty box the player can type in.

Dropping Guns

Error that appears when trying to use the "DropPrimary" command.

By default, the prototype has G mapped to the function "DropPrimary". However, when the G key is hit in-game, you will get an "unknown command" error and nothing happens. This is likely a leftover from previous builds, as demonstrated by the Coastline E3 2003 video (at 2:06), where Gordon can be seen throwing the shotgun away to pick up the rocket launcher, implying he wouldn't have been able to carry dozens of heavy firearms at the same time.

Features Removed From Release

Firing While Zoomed In

In the prototype, the player can attack while zoomed in. The final game removes this, presumably for game balance reasons.

Half-Life Leftovers

Training Room Error

The "New game" option also has a selection for "Training Room", just like the Steam version of Half-Life. Attempting to start a game with this selected will do nothing, but the console will give an error stating the game is attempting to look for a map called "t0a0". t0a0 is the name of the first tutorial map in Half-Life.

shell.mdl and shotgunshell.mdl

Reading the console right after the game has loaded shows that it's looking for two missing models, "models/shell.mdl" and "models/shotgunshell.mdl". These models were used in the original Half-Life for ejected 9mm brass (shell.mdl) and shotgun shells (shotgunshell.mdl). This does not cause any issues as the game already uses different spent brass models. Why these functions weren't removed is unknown.

Steam Leftovers

There are some leftover files related to Steam, such as files for setting up the server browser and text on the main menu.

Duplicate Textures

The root folder for model textures has several folders that were removed in the final game. They are "Bathroom", "Electronics", "Furniture", "Junk", "Lighting", "Pipes", and "Vehicle".

These folders contain a folder for each texture instead of dumping them all in the directory, like the prototype and final's prop folders do. In addition, the textures are named differently; all of the textures had "W_" (likely meaning "World", similarly to how weapon models are named in Source games) at the start of each one's file name, all of the words in their descriptions are capitalized, and some even have the texture size listed in brackets.

Since there are so few of these and many of the textures in these folders appear elsewhere in the prototype, it's likely they are leftovers from an earlier development period and weren't completely removed for whatever reason when the prototype was compiled.