Thief: Deadly Shadows

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Thief: Deadly Shadows
Thief: Deadly Shadows cover
Ion Storm
Eidos Interactive
Square Enix
Unreal Engine 2
Release dates
Windows May 25, 2004
Thief: Deadly Shadows on MobyGames
Thief: Deadly Shadows on Wikipedia
Thief: The Dark Project 1998
Thief II: The Metal Age 2000
Thief: Deadly Shadows 2004
The Dark Mod (unofficial spin-off) 2009
Thief 2014

Key points

The Sneaky Upgrade adds widescreen/multi-monitor support and fixes various issues. Includes the Gold Mod, which removes loading zones and fixes mission bugs.

General information

TTLG Forums - Thief Series Community Discussions for game series Support Page
Steam Community Discussions
A wiki for the classic Thief games


Source DRM Notes Keys OS
Disc check (requires the CD/DVD in the drive to play)
SecuROM DRM disc check.
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Green Man Gaming
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Humble Store
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Essential improvements[edit]


Patch v1.1 is the latest retail patch. Digital distribution versions already include this patch.

Skip intro videos[edit]

Change ShowIntroMovies in DEFAULT.INI[citation needed]
  1. Go to the installation folder.
  2. Go to the System folder and open DEFAULT.INI.
  3. Go to the [PCStartup] section.
  4. Change ShowIntroMovies=True to ShowIntroMovies=False
  5. Save your changes.


A detailed tweak guide for gameplay, graphics and other aspects is available.

Sneaky Upgrade[edit]

Includes "Thief 3 Gold", "The Minimalist Project" and "John P.'s texture pack" (all optional).
Adds native widescreen/multi-monitor support and fixes compatibility issues.
Gold mod removes most of the loading-zones in the levels, expands maps and fixes bugs.
Minimalist Project aims to provide an experience more like Thief: The Dark Project and Thief II. Increases the difficulty of the game.

Game data[edit]

Configuration file(s) location[edit]

System Location
Windows <path-to-game>\System\Default.ini[Note 1]
Linux (Proton) <Steam-folder>/steamapps/compatdata/6980/pfx/[Note 2]

Save game data location[edit]

System Location
Windows <path-to-game>\save\SaveGames[Note 1]
Linux (Proton) <Steam-folder>/steamapps/compatdata/6980/pfx/[Note 2]

Save game cloud syncing[edit]

System Native Notes
GOG Galaxy
Steam Cloud

Video settings[edit]

Video settings.
Video settings.
Graphics feature State WSGF Notes
Widescreen resolution
Install the Sneaky Upgrade to unlock all resolutions in-game.
Install the Sneaky Upgrade to unlock all resolutions in-game.
Install the Sneaky Upgrade and set SneakyTweaker HUD Width to 1.0.[1]
4K Ultra HD
Field of view (FOV)
See Field of view (FOV).
Toggle with Alt+ Enter.
Borderless fullscreen windowed
See the glossary page for potential workarounds.
Anisotropic filtering (AF)
See the glossary page for potential workarounds.
Anti-aliasing (AA)
Called MultiSampling; also see Use MultiSampling and Bloom together.
Vertical sync (Vsync)
Disabling can cause lock picking and ladder issues.
60 FPS
120+ FPS
Refresh rates above 60Hz cause lock picking and ladder issues.

Field of view (FOV)[edit]

This game uses vertical FOV. See FOV Calculator for help.
Set Sneaky Upgrade VerticalFOV[citation needed]
  1. Install the Sneaky Upgrade.
  2. Run the game and set your resolution.
  3. Go to the SAVES\SaveGames\User Options folder in the installation folder.
  4. Open SneakyOptions.ini.
  5. Change VerticalFOV to the vertical FOV you want and save your changes.

Input settings[edit]

Keyboard and mouse State Notes
Mouse acceleration
No mouse speed option in-game. Mouse speed seems to be also dependent on FPS.
Mouse sensitivity
See Mouse sensitivity.
Mouse input in menus
Mouse Y-axis inversion
Set in Options, Control.
Controller support
If plugged in, a controller can occasionally cause auto-walking. Additionally, a plugged in controller may crash the game if you rebind keys.

Mouse sensitivity[edit]

Set horizontal and vertical mouse sensitivities
  1. Install Sneaky Upgrade.
  2. Open the SneakyTweaker and go to Sneaky Upgrade/Tweaks.
  3. Change the Mouse Sensitivity Factor to your liking, with 1.0 being the default value.
  4. Press Apply and start the game.

Audio settings[edit]

Audio settings.
Audio settings.
Audio feature State Notes
Separate volume controls
Sound Effects and Music
Surround sound
Up to 7.0 output with DirectSound3D restoration software.
Subtitles for all speech (disabled by default).
Closed captions
Mute on focus lost
EAX support
EAX 3,[2] EAX 4[3]


Language UI Audio Sub Notes
Fan translation by KGy.
Fan translation by «Dark Fate Team» and «S.Siamsky, Xionus»
Fan translation, download.

Issues fixed[edit]

Intro movie keeps repeating[edit]

This problem occurs on multi-core systems and is fixed by the Sneaky Upgrade.
Use Sneaky Upgrade[citation needed]

Install the Sneaky Upgrade.

Garrett gets stuck when lock picking or using ladders[edit]

This is caused by high frame rates; enable Vsync and use a refresh rate no higher than 60 Hz.
Enable Vsync[5]
  1. Enable Vsync in-game.
  2. Ensure your in-game resolution has a refresh rate no higher than 60Hz.
  3. If problems persist disable Vsync in-game and force in the graphics card control panel instead.[4]

Game freezes or crashes when trying to load a save file[edit]

Lower the resolution[citation needed]
  • Lowering the game's resolution is reported to have solved this issue for some users.

Temporary switch to desktop or black screen when loading[edit]

Use Sneaky Upgrade[citation needed]
  1. Run the Sneaky Upgrade installer.
  2. When shown the installation options, enable the desktop effects fix.
  3. Continue installing normally. The game will now load without interruption.
A black screen may be seen momentarily at the start of loading a save when switching resolution.

Use MultiSampling and Bloom together[edit]

Deadly Shadows doesn't allow you to set both MultiSampling and Bloom in-game; enabling either will disable the other one.
Enable both settings[6]
  1. Enable Bloom in-game (leaving MultiSampling disabled).
  2. Force anti-aliasing through your graphics card's control panel. Both effects will now display together.

VR support[edit]

3D modes Native Notes
User created profile, requires DGVoodoo2 v 2.55.4, see profile introdution.
Note: Profile may not work with the latest wrapper, in case of issues please report to the vorpx forum.

Other information[edit]

Enabling HBAO+ on Nvidia graphics cards[edit]

Use the Ambient Occlusion flag 0x0000001E with Quality or High Quality.
Using Ambient Occlusion flag 0x0000001E[7]
  1. Install the Sneaky Upgrade and enable the 'Mouse Improvements' option.
  2. Download and run Nvidia Profile Inspector.
  3. Under Profiles select Thief 3 Deadly Shadows.
  4. Under Ambient Occlusion compatibility insert the flag 0x0000001E.
  5. Under Ambient Occlusion usage select Enabled.
  6. Under Ambient Occlusion setting select a quality level. In order to use HBAO+ you must use Quality or High Quality.
  7. Click Apply changes.
Introduces "bleeding", which affects certain game/HUD elements.


Technical specs Supported Notes
Direct3D 8
Shader Model support 1.1
Executable 32-bit 64-bit Notes


Middleware Notes
Physics Havok
Audio DirectSound3D

System requirements[edit]

Minimum Recommended
Operating system (OS) 2000
Processor (CPU) Intel Pentium 4 1.5 GHz
System memory (RAM) 256 MB
Hard disk drive (HDD) 3 GB
Video card (GPU) 64 MB of VRAM
DirectX 9.0 compatible
Shader model 1.1 support


  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>/6980/ in addition to or instead of this directory. The app ID (6980) may differ in some cases. Treat backslashes as forward slashes. See the glossary page for details.