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Avernum IV

From PCGamingWiki, the wiki about fixing PC games
Avernum IV
Avernum IV cover
Spiderweb Software
Release dates
Windows 2005
macOS (OS X) 2005
Monetization One-time game purchase
Microtransactions None
Modes Singleplayer
Perspectives Bird's-eye view, Isometric
Controls Point and select
Genres RPG
Art styles Pre-rendered graphics
Themes Fantasy
Series Avernum
Avernum IV on MobyGames
Avernum IV on Wikipedia
Subseries of Exile / Avernum
Avernum 2000
Avernum II 2000
Avernum III 2002
Blades of Avernum 2004
Avernum IV 2005
Avernum V 2007
Avernum VI 2009
Avernum: Escape from the Pit 2011
Avernum 2: Crystal Souls 2014
Avernum 3: Ruined World 2018


The macOS (OS X) version of this game does not work on macOS Catalina (version 10.15) or later due to the removal of support for 32-bit-only apps.

General information Community Discussions for game series Support Page
Official forum
Useful links
Steam Community Discussions


Source DRM Notes Keys OS
Developer website
Purchase via Humble Widget.
Icon overlay.png
macOS (OS X)
Part of "Avernum: The Complete Saga".
Icon overlay.png
A demo is available for both Windows and OS X.

Game data

Configuration file(s) location

System Location
Windows <path-to-game>\irunin.ini[Note 1]
macOS (OS X)
Steam Play (Linux) <SteamLibrary-folder>/steamapps/compatdata/206020/pfx/[Note 2]

Save game data location

System Location
Windows <path-to-game>\Data[Note 1]
macOS (OS X)
Steam Play (Linux) <SteamLibrary-folder>/steamapps/compatdata/206020/pfx/[Note 2]
Save game data folders are named Save0, Save1, etc.

Save game cloud syncing

System Native Notes
GOG Galaxy
Steam Cloud


Game settings
Game settings


Keyboard and mouse State Notes
See the glossary page for potential workarounds.
Mouse acceleration
Mouse sensitivity
Mouse input in menus
Mouse Y-axis inversion
Controller support
Controller types


Audio feature State Notes
Separate volume controls
Surround sound
No voicework present.
Closed captions
Mute on focus lost


Language UI Audio Sub Notes

Issues fixed

Installing from CD on Vista and later

If you have problems, follow these steps:
CD on Vista and later[citation needed]
  1. Open "Computer" in the Start menu, right-click on the CD and select Explore.
  2. Run the installer program (the application that has Install at the beginning of the name).

Installer/game not launching correctly on newer Macs

Renaming to .app[citation needed]
Blades of Avernum might not run properly on newer Macintoshes and trying to run the game/installer will give an error. This problem is caused by the name of the program not ending in .app.
  • To fix the problem, change the name of the program so it ends in .app. If you are trying to run an installer from a CD, copy it to your machine, change the name so that it ends in .app, and run it.

Screen Freeze Bug On OS X

In recent versions of OS X, game's graphics might occasionally freeze for a small number of users. The game is playing in the background and sound effects are still happening, but the graphics are no longer refreshed on the screen.
  • Solution:
    1. When the screen freezes, type Shift-R. This should enable you to resume the game normally.
    2. Upgrade to the newest version of the game.

Crash on Steam version

You can ask for a copy of Avernum IV if you have bought the game to the developer.

Slowdown on Windows

Slowdown[citation needed]
  • There is a rare problem in newer Windows machines where the game plays extremely slowly. This appears to be cause by an interaction between Avernum 4 and a driver or other piece of software we haven't identified.
  • If you encounter this problem, reboot your machine and run Avernum 4 before running any other programs. If you have any music software running in the background, quit it before running the game. There is a good chance that this will help the problem.
  • Also, some people have reported having the problem on systems with multiple monitors. Try deactivating the second monitor and see if the problem persists. If this solved the problem, please E-mail us and let us know. It will help greatly with finding a solution.

Unable to open sound channels

Audio MIDI Setup[citation needed]
  1. Open the Applications folder.
  2. Open the Utilities folder.
  3. In this folder, run "Audio MIDI Setup"
  4. Under Audio Output, change the Format to 44100.0 Hz.

Other information

Backing up the registration key

If you want to play the game with the same key, transfer the "avernum.dat" file (Windows) or "Avernum Prefs" (OS X) located in the Preferences folder (inside the Systems folder on your hard drive) to a safe place.

Requesting a new key

If you have lost a registration key, go to this page or e-mail the developer to get one.[2] Be sure to add:
  • The game title
  • The complete mailing address you ordered the game under (NOT an E-mail address)
  • The new game and/or editor registration number the game is giving you now
  • Windows or Macintosh version

Other information


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

System requirements

Minimum Recommended
Operating system (OS) XP or newer
Processor (CPU) 1.6 GHz
System memory (RAM) 256 MB
Hard disk drive (HDD) 30 MB
Video card (GPU) DirectX 7 compatible
macOS (OS X)
Minimum Recommended
Operating system (OS) 10.6.8
Processor (CPU) 1.6 GHz
System memory (RAM) 256 MB
Hard disk drive (HDD) 300 MB
Video card (GPU) 64 MB of VRAM
Recommended two-button mouse, or Apple mouse with Secondary Button / Secondary Click enabled.
These are system requirements; retail requirements are much lower.


  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 Notes regarding Steam Play (Linux) data:


  1. Blades of Avernum Tech Support - last accessed on May 2023
  2. General Games Troubleshooting FAQ - last accessed on May 2023
  3. Avernum: The Complete Saga on - last accessed on 2020-01-10
    "Mac notice: The game is 32-bit only and will not work on macOS 10.15 and up."