Aperture Tag: The Paint Gun Testing Initiative

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Aperture Tag: The Paint Gun Testing Initiative
Aperture Tag: The Paint Gun Testing Initiative cover
Aperture Tag Team
Release dates
Windows July 15, 2014
macOS (OS X) July 15, 2014
Linux July 15, 2014
Series Portal
Aperture Tag: The Paint Gun Testing Initiative on HowLongToBeat
Aperture Tag: The Paint Gun Testing Initiative on IGDB
Aperture Tag: The Paint Gun Testing Initiative on Wikipedia
Subseries of Half-Life
Portal 2007
Portal 2 2011
Portal 2 Sixense Perceptual Pack 2013
Aperture Tag: The Paint Gun Testing Initiative (unofficial mod) 2014
Portal Stories (series)
The Lab 2016
Bridge Constructor Portal 2017
Moondust 2018
Aperture Hand Lab 2019
Aperture Desk Job 2022

Key points

The game has to be installed on the same drive as Portal 2, otherwise the game may fail to start. See Missing background image.
Identical video, input and audio settings as those of Portal 2.
Comes bundled with a built-in level editor along with Steam Workshop support.

General information

Steam Community Discussions


Source DRM Notes Keys OS
Icon overlay.png
macOS (OS X)
All versions require Steam DRM and Portal 2.

Essential improvements[edit]

Skip intro videos[edit]

Use -novid command line argument[citation needed]

Disable motion blur[edit]

Use the +mat_motion_blur_percent_of_screen_max 0 command line argument[citation needed]

Run at monitor's refresh rate[edit]

Use the -refresh  command line argument, followed by the desired refresh rate.[citation needed]

Cap frame rate[edit]

Use the +fps_max  command line argument, followed by the desired frame rate.[citation needed]

Localization Files[edit]

To have subtitles translated to a language you need to change Steam to that language. Go to Steam > Properties > Interface > Select Language. Let steam restart and now subtitles will load with the new language.

To have translated menus you need to do the following. Go to your Steam library and right click the game. Select properties. Then the Language tab. Select a language from the drop down menu.

Game data[edit]

Configuration file(s) location[edit]

System Location
Steam <path-to-game>/aperturetag/cfg/
It's unknown whether this game follows the XDG Base Directory Specification on Linux. Please fill in this information.

Save game data location[edit]

System Location
Steam <path-to-game>/aperturetag/SAVE/

Save games not loadable from menu[edit]

Only "load last autosave" shows in menu. No load options for previously saved games.

Save game cloud syncing[edit]

System Native Notes
Steam Cloud




Audio feature State Notes
Separate volume controls
Master and music.
Surround sound
4.0, 5.1 and 7.1 surround sound.
Closed captions
Mute on focus lost
Always on.


If you aren't getting subtitles, see no subtitles.
Language UI Audio Sub Notes


Multiplayer types

Type Native Players Notes
Local play
LAN play
Online play
2 Co-op

Issues fixed[edit]

Crash after logo screens on Linux or OS X[edit]

This happens because of Portal 2 updates
Copy the files from Portal[1]

Missing executable[edit]

Verify Integrity of Game Cache[citation needed]
  1. Go to your Library, find Aperture Tag, right click on it and go to Properties.
  2. Under Local files select Verify Integrity of Game Cache.

Missing background image[edit]

The actual error message being Can't find background image materials/console/startup_loading.vtf
Install Portal 2 and Aperture Tag in the same Steam Library folder[citation needed]
Edit <path-to-game>/gameinfo.txt to use absolute paths[citation needed]

Auto-saved maps still being loaded[edit]

Simply create or load a new chamber[citation needed]

Crashing when publishing a map[edit]

Setting up[citation needed]
  1. Go to your Steam Community profile page then copy your profile link.
  2. Paste your link into the converter then copy the steamID64 value.
  3. Go to <path-to-game>\Aperture Tag\portal2\maps\puzzlemaker\
  4. Replace the folder's name with your 64-bit ID.


The level editor is only available for Windows.
These steps are only required once per installation.

No subtitles[edit]

Game may default to Steam's chosen language and only show localized closed captions but not subtitles even though language is selected correctly from game's Steam properties.[citation needed]
Change subtitle language[citation needed]
  1. Open Source engine console.
  2. Type cc_lang english


You may replace english with any supported languages.

Other information[edit]

Console commands[edit]

Games running on the Source engine can utilize Source Engine Console Commands for various tasks.
Enabling the console in Source games[2]
  1. Launch the game
  2. From the main menu, select Options
  3. Select the Keyboard tab
  4. Click the Advanced button
  5. Check the box next to Enable developer console (~)
  6. Click Apply


Press ~ to open the console.
Some commands may first require enabling "sv_cheats". You can do so by inputting sv_cheats 1 in the console.
Users without a US keyboard could experience some problems.

Launch options[edit]

View this Steam Support Article regarding launch options as well as the relevant Valve Developer wiki page for further information and a list of useful Source engine launch options.
Enabling a launch parameter[citation needed]
  1. Find the game in your Steam Library
  2. Right-click the game name
  3. Select Properties
  4. Select Set Launch Options...
  5. Input your selected launch options and separate each command with a space
  6. Press OK
  7. Launch the game

Other information[edit]


Executable 32-bit 64-bit Notes
macOS (OS X)


Middleware Notes
Cutscenes Bink Video Used for startup videos and in-game movies.

System requirements[edit]

Operating system (OS) XP, Vista, 7
Processor (CPU) 3 GHz P4, Dual Core 2.0 or AMD64X2
System memory (RAM) 1 GB (XP)
2 GB (Vista)
Hard disk drive (HDD) 3.5 GB
Video card (GPU) ATI Radeon X800
Nvidia GeForce 7600
Intel HD Graphics 2000
128 MB of VRAM
DirectX 9 compatible
Shader model 2.0b support
macOS (OS X)
Operating system (OS) 10.6.7
Processor (CPU) Intel Core Duo 2 GHz
System memory (RAM) 2 GB
Hard disk drive (HDD) 3.5 GB
Video card (GPU) ATI Radeon 2400
Nvidia GeForce 8600M
Intel HD Graphics 3000