Day One: Garry's Incident

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Day One: Garry's Incident
Day One: Garry's Incident cover
Wild Games Studio
Unreal Engine 3
Release dates
Windows September 25, 2013
Day One: Garry's Incident on Wikipedia

General information

Steam Community Discussions
Official website
Game manual


Source DRM Notes Keys OS
DRM-free after installation (requires an internet connection during installation)

Game data[edit]

Configuration file(s) location[edit]

System Location
Windows <path-to-game>\UDKGame\Config\[Note 1]
Linux (Proton) <Steam-folder>/steamapps/compatdata/242800/pfx/[Note 2]
Video settings are located in UDKEngine.ini.

Save game data location[edit]

System Location
Windows <path-to-game>\Binaries\Win32\*.sav[Note 1]
Linux (Proton) <Steam-folder>/steamapps/compatdata/242800/pfx/[Note 2]

Game data[edit]

Save game cloud syncing[edit]

System Native Notes
Steam Cloud

Video settings[edit]

Video settings.
Video settings.
Eleven new toggles in video settings have been added since launch due to player demand.
Many of them either don't do anything or have cryptic names with no explanations.
Graphics feature State Notes
Widescreen resolution
Some resolutions not listed; see Widescreen resolution.
4K Ultra HD
Field of view (FOV)
Use 0 and 9 to change FOV. See Field of view (FOV) for a permanent fix.
F11 or Alt+ Enter toggles between full screen and windowed modes.
Borderless fullscreen windowed
See the glossary page for potential workarounds.
Anisotropic filtering (AF)
The game defaults to 4 samples. See Anisotropic filtering (AF).
Anti-aliasing (AA)
Off by default. See Anti-aliasing (AA).
Vertical sync (Vsync)
60 FPS
120+ FPS
Frame rate is limited to 62 FPS; see High frame rate.

Widescreen resolution[edit]

In the Graphics Options the game allows a choice of pre-set resolutions. It does not populate this list bast on the modes supported by your system. It is possible to use less common resolutions such as 2048x1152 by editing a config file.
Adjust game resolution by editing UDKGame.ini[citation needed]
  1. Go to <path-to-game>\UDKGame\Config\
  2. Open UDKEngine.ini.
  3. In the [SystemSettings] section find ResX= and RexY= and change them to the desired vertical and horizontal resolution.
Making any changes through the game's Graphics Options will overwrite these custom values.

Field of view (FOV)[edit]

FOV can be adjusted within the game using 0 and 9 keys. However, it is reset back to its default of 90 upon reload or death.[1]
Permanent FOV fix by editing UDKGame.ini[citation needed]
  1. Go to <path-to-game>\UDKGame\Config\
  2. Open UDKGame.ini.
  3. In the [UTGame.UTPlayerController] section locate OnFootDefaultFOV=90.000000 and change to the desired value.

Anisotropic filtering (AF)[edit]

The game defaults to AF of 4. This can be increased to 8 or 16 to eliminate blurring of textures at sharp angles to the camera.
Adjust AF by editing UDKGame.ini[citation needed]
  1. Go to <path-to-game>\UDKGame\Config\
  2. Open UDKEngine.ini.
  3. In the [SystemSettings] section find MaxAnisotropy=4 and change to the desired value. Valid values are 1, 2, 4, 8 and 16.

Anti-aliasing (AA)[edit]

In Graphics Options the game has two toggable settings: MaxMultiSamples and bAllowD3D9MSAA. The first one toggles MaxMultiSamples= between 0 and 1, and the second toggles bAllowD3D9MSAA= between True and False in UDKGame.ini. Unfortunately, no combination of these toggles enables Anti-aliasing.
Adjust AA by editing UDKGame.ini[citation needed]
  1. Go to <path-to-game>\UDKGame\Config\
  2. Open UDKEngine.ini.
  3. In the [SystemSettings] section find MaxMultiSamples= and change to the desired value. Valid values are 1, 2, 4, and 8.
  4. Locate bAllowD3D9MSAA= in the same section and change to True.
Changing anything in the Graphics Options within the game will turn off Anti-aliasing.

High frame rate[edit]

Raise frame rate smoothing[citation needed]
  1. Go to the configuration file(s) location.
  2. Open UDKEngine.ini.
  3. Search MaxSmoothedFrameRate. Best value should be your monitor refresh rate +2 so e.g. with 144hz monitor value should be 146. Change configs value to this. There may be multiple instances so change them all.
  4. Save file.
For more information, see the Unreal Engine 3 page.

Input settings[edit]


Audio settings[edit]

Audio settings.
Audio settings.
Audio feature State Notes
Separate volume controls
Music, effects and voice sliders.
Surround sound
Closed captions
Mute on focus lost


Language UI Audio Sub Notes

VR support[edit]

Issues fixed[edit]

Restoring lost saved games[edit]

Adding saves to UDKSaveFile.ini[citation needed]


A 9/29/2013 update to the Steam version of the game made the game lose track of previously saved games. The saved game files are still there, however, the game does not see them because UDKSaveFile.ini was either overwritten or deleted with the update.
  1. Find the desired .sav file located in <path-to-game>\Binaries\Win32\. The latest saved game file could be identified by sorting the folder by date modified.
  2. Go to <path-to-game>\UDKGame\Config\
  3. Open UDKSaveFile.ini.
  4. Make a backup of the file in case the original needs to be restored.
  5. If UDKSaveFile.ini does not exist at the above location, start the game, click Options, then Graphics and then click Apply. This will create the file.
  6. Open the file in a text editor and add
    line to the end of the file, replacing <filename> with the file name you found in step 1. Do not include the .sav at the end. The newly added line should look something like
  7. Start the game and click on Load Game.
  8. The recovered save will appear as Day OneSavegame.
  9. Load the saved game and save again to make sure a proper saved game record is created.

Out of memory error[edit]

This error typically happens when exiting the temple.
By default a process can't address more than 2 GB of memory on 32-bit Windows. This limit can be raised to 3 GB using this command.
Increase user address space on 32-bit Windows[2]
  1. Right click on command prompt.
  2. Select Run as administrator.
  3. Type bcdedit /set IncreaseUserVa 3072 and press Enter.
  4. Restart computer.

Disable mouse smoothing[edit]

Disable mouse smoothing by editing UDKInput.ini[citation needed]
  1. Go to <path-to-game>\UDKGame\Config\
  2. Open UDKInput.ini.
  3. In the [Engine.PlayerInput] section locate bEnableMouseSmoothing=true and change it to false.

Other information[edit]


Executable 32-bit 64-bit Notes

System requirements[edit]

Minimum Recommended
Operating system (OS) XP, Vista, 7, 8
Processor (CPU) 2.2 GHz dual core
System memory (RAM) 4 GB
Hard disk drive (HDD) 3 GB
Video card (GPU) Nvidia GeForce GTX 260
896 MB of VRAM
DirectX 9.0c compatible
Sound (audio device) DirectX compatible


  1. 1.0 1.1 When running this game without Administrator elevation, activity in %PROGRAMFILES%, %PROGRAMFILES(X86)%, and %WINDIR% might be redirected to %LOCALAPPDATA%\VirtualStore\ (more details).
  2. 2.0 2.1 File/folder structure within this directory reflects the path(s) listed for Windows and/or Steam game data (use Wine regedit to access Windows registry paths). Games with Steam Cloud support may store data in ~/.steam/steam/userdata/<user-id>/242800/ in addition to or instead of this directory. The app ID (242800) may differ in some cases. Treat backslashes as forward slashes. See the glossary page for details.