Arx Fatalis

From PCGamingWiki, the wiki about fixing PC games
Arx Fatalis
Arx Fatalis cover
Arkane Studios
JoWood Productions
DreamCatcher Interactive
Release dates
Windows June 28, 2002
Arx Fatalis guide on StrategyWiki
Arx Fatalis on MobyGames
Arx Fatalis on Wikipedia

Key points

Arx Libertatis updates and improves support for modern systems, porting the game to new systems as well as eliminating bugs and limitations.

General information

Arx Libertatis Wiki Community Discussions Support Page
Steam Community Discussions


Source DRM Notes Keys OS
Disc check (requires the CD/DVD in the drive to play)
Patched to 1.21.
Microsoft Store
Microsoft Store
Included in Xbox Game Pass for PC
Icon overlay.png
Patched to 1.21.
A demo is available from Steam.

Essential improvements


Arx Fatalis Patch 1.21 (2011) fixes some issues with running the game on modern systems. This patch will update any version; no previous patch is required.

Digital distribution versions usually include this patch but disc versions do not.

Arx Libertatis port

Arx Libertatis is a modern port for Windows and Linux that fixes numerous issues (install Arx Fatalis Patch 1.21 first if using a disc version).

The most recent official release, 1.1.2, is from October 2013. Try the latest development snapshot to take advantage of the project's more recent improvements. Bear in mind that a small number of known regressions and issues have cropped up in the development versions. These builds are not fully tested, but generally very stable. Development snapshots may be installed by extracting to the Arx Fatalis installation folder or on a previous installation of Arx Libertatis.

HD Textures - Arx Neuralis

Original game textures upscaled with neural networks. All game textures are upscaled. Download on Nexus or ModDB

Game data

Configuration file(s) location

System Location
Windows <path-to-game>\cfg_default.ini[Note 1]
Steam Play (Linux) <Steam-folder>/steamapps/compatdata/1700/pfx/[Note 2]
Arx Libertatis settings are stored in %USERPROFILE%\Saved Games\Arx Libertatis\cfg.ini

Save game data location

System Location
Windows <path-to-game>\Save[Note 1]
Steam Play (Linux) <Steam-folder>/steamapps/compatdata/1700/pfx/[Note 2]
Arx Libertatis saves are stored in %USERPROFILE%\Saved Games\Arx Libertatis\save

Save game cloud syncing

System Native Notes
GOG Galaxy
Steam Cloud
Xbox Cloud

Video settings

Video settings.
Video settings.

Graphics feature State WSGF Notes
Widescreen resolution
Requires Arx Fatalis Patch 1.21. See Widescreen resolution.
Use Arx Libertatis.
Use Arx Libertatis.
4K Ultra HD
Field of view (FOV)
Use the latest development snapshot of Arx Libertatis. Has 10 increments up by a value of 5° from 75° to 125°.
See Windowed.
Borderless fullscreen windowed
Use Arx Libertatis with Borderless Windowed.
Anisotropic filtering (AF)
Force in graphics card control panel or use Arx Libertatis (enabled by default).
Anti-aliasing (AA)
Forcing in the graphics card control panel will cause Invisible text.
Vertical sync (Vsync)
Use Arx Libertatis (enabled by default).
60 FPS
120+ FPS
Arx Libertatis has no frame rate cap.

Widescreen resolution

Some resolutions may not work when selected in-game but can still be used by editing cfg_default.ini directly.
Set unsupported resolution in cfg_default.ini[1]
  1. Go to the configuration file(s) location.
  2. Open cfg_default.ini (cfg.ini if using Arx Libertatis).
  3. Set resolution= to match the resolution you want.
  4. Save your changes. The in-game setting may show 640x480 but the manual resolution will still be used.


Changing video settings in-game may reset the resolution change. Repeat these steps if necessary.
If problems persist use Arx Libertatis.


Enable windowed mode[citation needed]
  1. Go to the configuration file(s) location.
  2. Open cfg_default.ini (cfg.ini if using Arx Libertatis).
  3. Change full_screen=1 to full_screen=0
  4. Save your changes. Reverse this change to go back to fullscreen mode.


Arx Fatalis has a fixed-size window; for a resizeable window use Arx Libertatis.

Input settings

Input settings.
Input settings.

Keyboard and mouse State Notes
Mouse acceleration
None by default. Recent Arx Libertatis development snapshots allow this to be enabled, as well as having the option to enable raw mouse input (to bypass Windows desktop mouse acceleration) in the options menu.
Mouse sensitivity
Mouse input in menus
Mouse Y-axis inversion
Controller support
See the glossary page for potential workarounds.

Audio settings

Audio settings.
Audio settings.

Audio feature State Notes
Separate volume controls
Master, SFX, Speech and Ambience sliders.
Surround sound
Up to 7.0 output with DirectSound3D restoration software, or OpenAL Soft if using Arx Libertatis
Conversations and cutscenes only; all other speech has no subtitles.
Closed captions
Mute on focus lost
True for Arx Fatalis. False for latest Arx Libertatis release but can be enabled in recent development snapshots (in the audio options menu).
EAX support
EAX 2. Disabled by default. Required EAX Unified[2] before patch 1.21[3]
Arx Libertatis replaces deprecated DirectSound3D API with OpenAL Soft, which can be used for binaural HRTF mixing.[4] No EAX reverb calls are used in-game.


Language UI Audio Sub Notes
Traditional Chinese
Not available on Steam.
Not available on Steam.
Fan translation, download.
Fan translation, download.
Fan translation, download.

VR support

3D modes Native Notes
Game is not on official list but on the factory profile list, so its not clear wherether its a user created or official profile. To get the game running you first need to install the original, then patch 1.2 and Arx Liberatis.

Issues fixed

HUD doesn't scale at higher resolutions

Arx Fatalis 1.21 interface elements are very small at higher resolutions. This issue was acknowledged by Arx Liberatis development team and the solution is targeted for Arx Liberatis 1.2 release.[5]
HUD scaling[citation needed]

HUD scaling is present in the most recent Arx Libertatis development snapshots and can be enabled in the Video Options.

Invisible text

This is caused by forcing anti-aliasing through your video card's control panel.
Use Arx Libertatis[citation needed]

Use Arx Libertatis.

Set application controlled anti-aliasing[6]
  1. Go to the video card control panel.
  2. Set anti-aliasing to "application-controlled".
  3. Enable anti-aliasing in-game (optional).

Other information


Executable 32-bit 64-bit Notes
Use Arx Libertatis for 64-bit.
Use Arx Libertatis.

System requirements

Minimum Recommended
Operating system (OS) 98
Processor (CPU) 500 MHz Pentium III or compatible
System memory (RAM) 64 MB
Hard disk drive (HDD) 750 MB
Video card (GPU) 16 MB of VRAM


  1. 1.0 1.1 When running this game without elevated privileges (Run as administrator option), write operations against a location below %PROGRAMFILES%, %PROGRAMDATA%, or %WINDIR% might be redirected to %LOCALAPPDATA%\VirtualStore on Windows Vista and later (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>/1700/ in addition to or instead of this directory. The app ID (1700) may differ in some cases. Treat backslashes as forward slashes. See the glossary page for details.