Dungeon Defenders

From PCGamingWiki, the wiki about fixing PC games
Dungeon Defenders
Dungeon Defenders cover
Trendy Entertainment
Linux Ryan C. Gordon
Reverb Publishing
Unreal Engine 3
Release dates
Windows October 19, 2011
OS X March 15, 2012
Linux December 19, 2012
Dungeon Defenders
Dungeon Defenders 2011
Dungeon Defenders Eternity 2014
Dungeon Defenders II TBA

Key points

The OS X and Linux versions of the game do not have a launcher, making certain features hard to configure.
Online multiplayer in DRM-free versions has stopped working on May 31, 2014 due to GameSpy services being shut down.[1]
The Linux version has game breaking bugs and lacks certain features.

General information

Official Forums
Dungeon Defenders Wiki
Steam Community Discussions
Steam Users' Forums


Source DRM Notes Keys OS
Humble Store Includes all DLC with purchase.
Steam Requires separate log-in to developer's servers for multiplayer
DLC is only available for the Steam version.

Game data[edit]

Configuration file(s) location[edit]

System Location
Linux $XDG_DATA_HOME/DungeonDefenders/
Steam <Steam-folder>/userdata/<user-id>/65800/remote/

Save game data location[edit]

System Location
Linux $XDG_DATA_HOME/DungeonDefenders/
Steam <Steam-folder>/userdata/<user-id>/65800/remote/
This game supports the XDG Base Directory Specification on Linux.

Save game cloud syncing[edit]

System Native Notes
Steam Cloud
Syncs save games.

Video settings[edit]

Launcher options menu.
Launcher options menu.
Graphics option Option WSGF Notes
Widescreen resolution
Change the resolution further using ResX and ResY in *-UDKEngine.ini in config location.
Field of view (FOV)
Borderless fullscreen windowed
Anisotropic filtering (AF)
MaxAnisotropy in *-UDKEngine.ini in config location.
Anti-aliasing (AA)
MaxMultisamples in *-UDKEngine.ini in config location.
Vertical sync (Vsync)
Settings in game's launcher.
60 FPS
120+ FPS
The game forces UE3's frame rate smoothing with a 62 fps cap, even if you try to disable it.

Input settings[edit]

Launcher control settings.
Launcher control settings.

Audio settings[edit]

Audio options Native Notes
Separate volume controls
Music, SFX, incoming voice (microphone)
Surround sound
Up to 7.1 output[2]
Closed captions
Mute on focus lost


Language UI Audio CC Notes


Multiplayer types

Type Native Players Notes
Local play
4 Co-op
LAN play
4 Co-op
Online play
4 Co-op
Online modes no longer work for the DRM-free versions.[1]

Connection types


Protocol Port(s) and/or port range(s)
This game supports Universal Plug and Play (UPnP) for automatic port configuration.

Issues fixed[edit]

Game does not launch[edit]

Rename the main EXE file[3]
  1. Go to <path-to-game>\Binaries\Win32
  2. Rename DungeonDefenders.exe to DungeonDefenders.old
  3. Rename DunDefGame.exe to DungeonDefenders.exe
  4. Launch the game.

Connectivity Issues[edit]

You may receive a message "Connection to host has been lost". This is a misleading error message indicating that you do not have DLC owned by the host.

Failed to Create Game[edit]

Uninstall hamachi or if you have Virtualbox/VMware installed disable their network adapters

Other information[edit]

Launch directly to game and skip the launcher[edit]

Use the -nosplash command line argument

Configuration tweaks[edit]

Edit UDKEngine.ini[4]
Before changing any of the entries in the below file, please make a backup of file for safety.
  1. Go to the installation folder.
  2. Open UDKGame\Config\UDKEngine.ini
  3. Make the changes below.
After making modifications to UDKEngine.ini file, set file to read-only to prevent game client from resetting changes that were made. Also, Steam will reset this game file if it needs to verify the game cache - make a backup as needed.
  • Best Quality - Most extreme performance hit to system - Can affect frame rate
  • High Quality = Recommended of fully DirectX 10/11 compliant video card - Possible impact on frame rate
  • Better Quality = Recommended of DirectX 9/10/11 compliant video card - Minimal impact on frame rate

Section: [SystemSettings]

Setting Name Better Quality Setting High Quality Setting Best Quality Setting Notes
Trilinear True N/A N/A This entry will need to be manually entered - Ex. Trilinear=True
UseVsync True N/A N/A Forces Vertical sync (Vsync)
Fullscreen True N/A N/A Forces full screen mode
MaxAnisotropy Default 12 16 none
MaxMultisamples Default 4 16 none
bEnableBranchingPCFShadows True N/A N/A none
bAllowBetterModulatedShadows True N/A N/A none
bEnableForegroundShadowsOnWorld True N/A N/A none
bEnableForegroundSelfShadowing True N/A N/A none
ParticleLODBias -1 N/A N/A none

Section: [TextureStreaming]

Setting Name Better Quality Setting Notes
PoolSize 320 none
HysteresisLimit 20 none
DropMipLevelsLimit 16 none
StopIncreasingLimit 12 none
StopStreamingLimit 8 none
MinEvictSize 12 none
MinFudgeFactor 0.5 none
FudgeFactorIncreaseRateOfChange 0.5 none
FudgeFactorDecreaseRateOfChange -0.4 none
MinRequestedMipsToConsider 11 none
MinTimeToGuaranteeMinMipCount 0 none
MaxTimeToGuaranteeMinMipCount 0 none
UseTextureFileCache True none
LoadMapTimeLimit 4.0 none
LightmapStreamingFactor 0.04 none
MaxLightmapRadius 2000.0 none
AllowStreamingLightmaps False none

Full Screen Split-Screen With Dual Monitors[edit]

AMD Eyefinity
  1. Enable Eyefinity mode using the two monitors you want to use.
  2. Run Dungeon Defenders and set the resolution (via the launcher options menu) to the resolution of the Eyefinity monitor you have created (E.g. 3840x1080).
  3. In-game, set the split-screen mode to Vertical.
Nvidia Surround
  1. Enable Nvidia Surround mode using the two monitors you want to use.
  2. Run Dungeon Defenders and set the resolution (via the launcher options menu) to the resolution of the Surround monitor you have created (E.g. 3840x1080).
  3. In-game, set the split-screen mode to Vertical.


Note that in both cases the menu will be in between the two monitors - This can be difficult to see.

System requirements[edit]

Minimum Recommended
Operating system (OS) XP 7
Processor (CPU) 1 GHz Dual-core Quad core Intel or AMD Phenom Quad core
System memory (RAM) 1 GB
Hard disk drive (HDD) 6 GB
Video card (GPU) ATI Radeon x1300
Nvidia GeForce 6200
256 MB of VRAM
ATI Radeon HD 4350
Nvidia GeForce 100M
Controller Xbox 360 controller
Operating system (OS) 10.6.3
Processor (CPU) 1.3 GHz Intel
System memory (RAM) 2 GB
Hard disk drive (HDD) 6 GB
Video card (GPU) 256 MB of VRAM
OpenGL 2.1 compatible
Shader model 3 support
Operating system (OS) Ubuntu 12.04
Processor (CPU) 2 GHz
System memory (RAM) 2 GB
Hard disk drive (HDD) 6 GB
Video card (GPU) ATI Radeon HD 2400
NVIDIA GeForce 7600
OpenGL 2.1 compatible


  1. 1.0 1.1 GameSpy Servers are Shutting Down
  2. PC Gaming Surround Sound Round-up
  3. Game don't launch - Steam Community Discussions for Dungeon Defenders
  4. Dungeon Defenders Tweaks - Steam Users' Forums for Dungeon Defenders