The patch contains various bugfixes and game improvements such as widescreen support, and provides some GUI tweaks. It also enables the use of the FMSel fan mission loader frontend with Thief 3 and bundles the most important T3 mods. It works with the GOG and Steam versions of the game.

Original game bugs and issues that have been fixed or improved:

  • New missions and restarted missions will use your chosen difficulty instead of Normal/Easy
  • The City sections are played on your chosen difficulty instead of always being on Normal
  • Frame rate and refresh rate limiting fixes broken lockpicking, ladder climbing and wall flattening
  • Some speed-up of level loading, especially with vsync on
  • Fix for the desktop being visible during level loading on Vista and up
  • The game will no longer crash when binding an analogue controller through the keybinds screen
  • Fix for controller axes sometimes being set up reverted
  • Fix for a crash that could happen when using the game's multisampling option
  • Fix for the mouse freezing or becoming invisible when using large font size settings in Windows
  • Fix for the vsync (and possibly brightness) settings not working on Windows 10
  • Optional fix for running on a single core to avoid an issue with the trailer video looping

Game improvements:

  • All resolutions reported by the system, plus an optional custom display mode, are available from the options screen. The aspect ratio is shown as well
  • In widescreen the horizontal view is extended, instead of cropping off the top and bottom
  • The field-of-view can be specified by the user. The setting will work with both the original game and fan missions, with existing savegames and with missions which use scripted FOV changes. FOV adjustment includes the mechanical eye and bow zoom
  • The HUD and menus are shown correctly, regardless of resolution and aspect ratio. In 3-monitor modes, the HUD can be constricted to the center monitor
  • The main menu and loading screens are shown correctly, at 4:3 aspect. The proper movies, which are letterboxed, are allowed to crop to fit the monitor (up to 16:9)
  • Take screenshots with descriptive file names, and automatically with savegames
  • XBox360-type gamepads are working, the triggers are mapped to buttons. Support for up to 16 gamepad buttons using modifiers. Mouse and escape key emulation
  • Run the game on a display other than the primary
  • Multiple quick saves, quick load the most recent save

As an FM loader, the emphasis is on ease of use and reliability:

  • Easy to set up – besides this patch there is nothing to install or configure
  • The contents of your game installation folder are never changed. (GarrettLoader has a habit of messing up your installation)
  • Works even if the game is installed in Program Files
  • Automatically installs custom conversations. (Used in the FM All the World's a Stage)
  • Fixes for crash on save and crash on exit in certain FMs, and for the mechanical eye zoom not working in many FMs
  • Fix for the in-game loot list showing wrong values and total in certain FMs
  • The FMSel supplied with the installer is slightly improved over the NewDark version

Additionally some optional tweaks have been incorporated:

  • Mirror and/or scale down the main HUD
  • Scale down loading screen text
  • Minor HUD and GUI tweaks: Remove loading screen tips, mechanical eye overlay, main menu version text, "Nothing" texts, loot percentage, purple fog, 'bouncing arrows', junk item flashing and the lockpicking HUD
  • Alternative background modes for the readable/map and pause screens
  • Better mouse response and removed motion blur, adjust mouse sensitivity
  • More realistic physics, gravity multiplier
  • Scale the difficulty up or down. (Can be set to zero for a 'notarget' cheat)
  • Disable auto-raising of the blackjack and dagger
  • Reduce or remove headbobbing
  • No switch to third person in death
  • Classic speed. (Walk by default, run qualifier) and a speed multiplier
  • Decrease or increase the ambient fog or ambient light in any level
  • Human-readable savegame folder names
  • Borderless windowed mode
  • Sound volume for cutscenes and other videos

All tweaks are disabled by default.

The full edition includes the mods The Minimalist Project, The Collective Texture Pack (a.k.a. John P), "GarrAT" Garrett Animation Tweaks, Thief 3 Gold, Briefing Videos and a small mod providing updated font textures. Please see those threads or the included readme files for more information. The update edition only includes the SU patch and the SneakyTweaker tool. It provides a much smaller download in cases where the mods are unchanged since the last release.


Tester hall of fame: Adsk1, Acleacius, Abysmal, fortuni, Maruchin, Linda, noblehelm, Cigam, mensch, AluminumHaste, Depili, Kerrle, decayedmatter, DJ Riff, lowenz, Lolwutman, Corsair, bikerdude, Beleg Cúthalion, Child Of Karras, gnartsch, chrish, Pheonix, PsymH, Hiatus, tolsen64, Xarg, Zaratul, voodoo47, Lord Soth, scavvenjahh, scarcow and TreyM.

This patch builds on previous fixes and ideas etc. from the following sources: massimilianogoi, tolsen64, Hadley, NotCarolKaye, daremo, Xiaopang, New Horizon, Pheonix, Kerrle, lolwutman, swaaye and UCyborg...

A huge thanks goes to le Corbeau for NewDark and FMSel, to John P, New Horizon, Beleg Cúthalion and mensch for permission to include their mods, and to the FMSel translators: gnartsch (German), Briareos H (French) and raven4444 (Polish). Thanks also to clearing, Lord Soth and Esme for file mirrors.

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1.1.9 is out, this time with some often-requested additional configurability for the Minimalist Project. There's also a small new mod containing improved font textures for both the original game and Minimalist.

Important: Because the stack of mods has changed in this version it is highly recommended to replace all currently installed mods during installation!

Several people using dual- or multi-monitor setups have reported having mouse cursor issues - those should now hopefully be fixed. If you have such a setup, please test!

Other fixes and improvements:

  • The game exe now has much more space for 'property storage' - safeguarding against a crash-on-save when playing the biggest maps in a much cleaner way than previous work-arounds
  • Fix for a rare issue which could cause the objectives to disappear after some time
  • The installer now has a page for selecting the game language. (English, German, French, Italian)
  • There's a new tweak for changing the sound volume for cutscenes and other videos
  • The game is now allowed to run on multiple cores by default

The single-core mode applied by previous versions seems to be unneeded on modern Windows. But if you do get the immediately looping trailer issue when you start the game, please report what Windows version you have (and then enable single-core mode on the tweaker's Troubleshooting page).

Another request: If you have savegames (original or with the SU 1.1.8 or earlier) which the game deems 'damaged' when you try to load them, please upload them somewhere and PM me a link. That's because the big maps made possible by the expanded property storage have revealed a latent bug, which can cause the 'damaged' message. Since it's fixable, I'd like to know if any existing maps can cause it too.

Minimalist improvements:

  • Split into two parts, GUI/sounds and gameplay, which can be enabled separately
  • Removing back buttons is now a general tweak - off (by default) in the main SU but on in the MP
  • Third person can be enabled
  • Playstyles can be disabled, which will restore the standard difficulty settings and objectives
  • Loot glint activation distance can be set to three different values (and "off")
  • Improved font textures (as part of the new fonts mod)
  • Fixed a small incompatibility between the Cutpurse playstyle and the T3G Inn mission
  • Small fix for the Cutpurse time limit countdown not working. (Now shows elapsed time instead)
  • Savegames made with the MP gamesys are now kept separate

Here's a screenshot with only the GUI/sounds part enabled, showing the standard difficulty settings and back button:

Optional play styles in Minimalist

There was at least one documented case of things breaking because an original save was used with the MP or vice-versa. So MP savegames are now kept separate and versioned. This means that saves can end up in four different folders depending on whether T3 Gold and/or MP was enabled - and the main menu version string is getting a bit ridiculous:

Improved Carleton font

As the screenshots show, the updated main font texture does not always provide much visible improvement - it works best for loading screens, pop-up texts and subtitles. The other font, used in readables, is also not really visibly improved but the letters are slightly smaller so the text is a better match for how readables look without Minimalist:

Improved J.D. font

In order to make third-person optional it was necessary to replace the shader-based flat frob feature with a texture-based solution, adapted from the feature in John P's texture pack. On small objects there's no real difference, but on big objects, such as doors, there's a visible difference. Here's a video showing some of the GUI and texts, and a comparison of the new and old flat frob hilight:

Here's an example of the fonts mod in use with the original game:

Improved Papyrus font

As in the case of Minimalist, it's mostly an improvement for bigger GUI text. The font used for button text doesn't really show improvement but it has accented characters in the proper font instead of some generic glyphs copied in from elsewhere.

Known issues: On Windows XP the patched game will run fine but the tweaker will refuse to start (missing a DLL) and FMSel will crash. Anybody out there who still cares about XP?

Sneaky Upgrade Editor Edition 1.1.9 released

Sneaky Upgrade Editor Edition 1.1.9 released


Many changes, including one that makes very large maps possible!

Sneaky Upgrade Beta

Sneaky Upgrade Beta


A Beta with multi-monitor fixes, Minimalist improvements and new font textures.

Sneaky Upgrade 1.1.8 released

Sneaky Upgrade 1.1.8 released

News 2 comments

Inn mission without tutorial stuff, vsync is back on Win10, multiple quick saves, fixes...

Sneaky Upgrade released

Sneaky Upgrade released


Fixing a couple of bugs, most importantly in the Garret animations mod.

RSS Files
Sneaky Upgrade Beta

Sneaky Upgrade Beta

Patch 13 comments

Beta version of the Full Edition. Obsolete, get 1.1.9 instead.

Thief 3 Loot Hunter

Thief 3 Loot Hunter

Other 6 comments

Crude tool for locating loot, keys and arrows in Thief 3 and (primarily) its fan missions. Be sure to read the readme!

Sneaky Upgrade Editor Edition

Sneaky Upgrade Editor Edition


Unofficial patches for the Thief 3 Editor: Have multiple independent editor installs, launch the patched game exe through "Send to Xbox", generate IBT...

Sneaky Upgrade Full Edition

Sneaky Upgrade Full Edition

Patch 22 comments

Unofficial patch for Thief 3: Bugfixes, widescreen support, GUI tweaks, FM loading. This version includes the mods The Collective Texture Pack, Garrett...

Sneaky Upgrade Update Edition

Sneaky Upgrade Update Edition

Patch 2 comments

Unofficial patch for Thief 3: Bugfixes, widescreen support, GUI tweaks, FM loading. Much smaller download for when there's no changes to the bundled mods...

Comments  (0 - 10 of 76)

hey man, everytime i want to install the mod i get a virus notification from my av software. something wrong with these files?

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snobel Creator

No, it's a false positive. Report it as such to your AV vendor, with a link to the file.

Reply Good karma+1 vote

Why the reduction in mappable gamepad buttons? Wasn't there like 18 before?

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snobel Creator

No - the original game was limited but you get the full set with the patch (although you have to set up modifiers in the tweak tool).

Reply Good karma+1 vote

This is an exceptionally good mod, IMO. Thief: Deadly Shadows ia an extremely good game that cops way too much **** for "Waaagh, not as good as muh Thief 1/2." It strikes an excellent middle ground between depth and accessibility and has extremely good atmosphere and general game design that is polished to a shine by mods. Once the level breaks were removed and the bugs were fixed the game was absolutely fine.

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snobel Creator

Thanks - I of course agree that T3 is underrated, even if much was lost from shoehorning it into the original Xbox.

Reply Good karma+1 vote

Is anyone else having issues with the training mission not ending? I've finished all the objectives, and am back on street level. However, the objective "Leave the Inn once you have the velvet bag" never gets ticked, so the mission never ends. I've tried running all the way to the entry point of the level too.

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snobel Creator

It should end when you get back to the starting point. Which difficulty setting? Which way did you leave the inn?

Reply Good karma+1 vote

Howdy! I just played the first mission on easy difficulty, then it worked. It ended the mission as I got past the final guard after stealing the nobleman's purse.

PS: thanks so much for this awesome mod!!

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snobel Creator

Yes - the Easy difficulty retains the original tutorial elements so it will end in the same way. Do you remember which difficulty you played before switching to Easy?

Reply Good karma+1 vote

I was on normal difficulty. I just replayed mission 1 on normal to confirm, and I get the same behaviour. I can try record it if that would help? I'm sure there must be simple software to record gameplay sessions.

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