Anonymous edits have been disabled on the wiki. If you want to contribute please login or create an account.

Halo Online

From PCGamingWiki, the wiki about fixing PC games
Revision as of 08:05, 21 November 2022 by 2405:8100:8000:5ca1::1d:fd60 (talk) (Eldewrito's website isn't working, so I put up an Internet Archive link for the time being. Please revert when the page goes back online.)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Halo Online
Halo Online cover
343 Industries
Saber Interactive
Windows Microsoft Studios
Microsoft Studios
Innova Systems
Halo Engine
Release dates
Windows 2015
Series Halo
Halo Online on Wikipedia
Halo: Combat Evolved 2003
Halo 2 2007
Halo: Spartan (series)
Halo Online 2015*
Halo 5: Forge 2016
Halo Wars (series)
Halo Recruit 2017
Halo: The Master Chief Collection (series)
Halo Infinite 2021

Key points

The official release under Microsoft Studios for Russian players was cancelled in 2016. However, Halo Online is playable worldwide with the ElDewrito Mod, which is now essential for play. As such all guides on this page are in reference to the aforementioned mod.

General information

Halo Waypoint - Official Beta Launch of Halo Online testing under Microsoft Studios in Russia - Official Page of ElDewrito Mod - Official blog for the ElDewrito Mod
r/HaloOnline Subreddit for Halo Online and ElDewrito Help and Discussion.
ElDewrito Source Code - ElDewrito Mod Repository


Not officially available. Requires the ElDewrito Mod to play the game.[1]

Essential improvements


Provides bug fixes and quality of life improvements including 21:9 support, extended FOV slider, and raw mouse input.
Players can host multiplayer and Forge games with up to 16 players with this mod.
The ElDewrito Mod's development has been put on hold until further notice, due to discussions with Microsoft regarding the reverse-engineering of their intellectual property - Game can still be played in spite of this just no further updates.[2]
Installing the ElDewrito Mod[3]
  1. Obtain the "Halo Online 1.106708 cert_ms23" archive.
    Safe Checksums for Base ms23 files:
    • MD5: 5ae9e3d0a4952686cedb7d7261ad6c11
    • SHA1: 1293f856720af0685adadcc4082c9f97e078a4fa
    • SHA256: 4674454e0e973573e43c4025e894820523ab4e665108248dc9eb1c9a5a09ec1
  2. Download the ElDewrito Updater which can be found on the r/HaloOnline Get Started Page.
  3. Extract the Base Halo Online files that were obtained earlier, and then the Updater archive into the same directory.
  4. Run <path-to-game>\updater.exe and update to 0.6.0.
  5. Once updated the user will need to run the Updater again to update to 0.6.1.
  6. Launch <path-to-game>\eldorado.exe to play the game.

Game data

Configuration file(s) location

System Location
Windows <path-to-game>\dewrito_prefs.cfg[Note 1]


In order to access game settings on keyboard and mouse, press Home from the main menu.
Can only select Resolutions up to Desktop Resolution of the Primary Monitor
In-game general video settings.
In-game general video settings.
In-game advanced video settings.
In-game advanced video settings.
In-game general game settings.
In-game general game settings.

Graphics feature State Notes
Widescreen resolution
4K Ultra HD
Field of view (FOV)
Supports between 55° and 120° (Hor+)
Borderless fullscreen windowed
Exclusive Fullscreen not Supported.
Anisotropic filtering (AF)
Bundled as part of "Texture Filtering" Setting.
Anti-aliasing (AA)
Post-Processing AA - Does not support Downsampling Techniques such as SSAA or DSR
Vertical sync (Vsync)
Enabled by default; to disable toggle the "Fix FPS Stutter" option in the Video Settings
60 FPS
120+ FPS
Physics are locked at 60Hz
High dynamic range display (HDR)
See the glossary page for potential alternatives.


In-game general control settings.
In-game general control settings.
In-game general gamepad settings - also showing the "Halo Online Default" gamepad scheme.
In-game general gamepad settings - also showing the "Halo Online Default" gamepad scheme.

Keyboard and mouse State Notes
Mouse acceleration
Mouse sensitivity
Mouse input in menus
Halo 3 UI can only be navigated using the Keyboard, or Gamepad
Mouse Y-axis inversion
Controller support
Only has native support for XInput
Full controller support
Requires a Keyboard and Mouse to navigate certain menus.
Controller remapping
See Controller remapping.
Controller sensitivity
Controller Y-axis inversion
Controller types
XInput-compatible controllers
Both Xbox 360 and Xbox One controllers are supported with icons
Xbox button prompts
Both Xbox 360 and Xbox One controllers are supported with icons
Impulse Trigger vibration
DualShock 4 controllers
Launching the game through Steam with Overlay will allow Steam to convert the DS4 input to Xinput such that Halo Online can support
DualShock button prompts
Without modification there is no in-game icons for any PlayStation controller
Light bar support
Connection modes unknown
Generic/other controllers
Additional information
Controller hotplugging
Haptic feedback
Simultaneous controller+KB/M

Controller remapping

Halo 3

Halo Reach

Halo 4


In-game general audio settings.
In-game general audio settings.

Audio feature State Notes
Separate volume controls
SFX, and Music
Surround sound
Closed captions
Mute on focus lost
Royalty free audio


ElDewrito UI and In-game HUD does not respond to Language changes and remains in English.
Language UI Audio Sub Notes


Multiplayer types

Type Native Players Notes
Local play
4 Versus
Start the game with -multiinstance parameter.
LAN play
16 Versus
Online play
16 Versus

Connection types

Type Native Notes
See this Guide for how to set up a Dedicated Server for Halo Online's ElDewrito Mod
Direct IP
Open the console (~) and use connect followed by the IP and port.


Protocol Port(s) and/or port range(s)
TCP 11775, 11777
UDP 11774
This game supports Universal Plug and Play (UPnP) for automatic port configuration.

Issues fixed

The best way to report game issues to the ElDewrito community and get assistance, is via the mod's latest bug report thread.

Crash on Nvidia RTX chipsets

The game has a bug whereby Contrails cause the game to crash, notably on RTX GPUs.[4]
Replace binkw32.dll with this version
  1. Download the Unofficial Mod Patch which fixes the RTX GPU crashes when the game uses contrails.
  2. Navigate to <path-to-game> and replace the binkw32.dll with this one.


Tested on a Nvidia GeForce RTX 2080ti on Windows 10 build 1809 [5]
If the player has used the previous version of this fix, they must also download the original mtndew.dll file - which is also included in the link - and replace the modified mtndew.dll with the original one.

Game is too bright on Intel HD Graphics

Enable the Bloom (Brightness) Patch in the game's Advanced Video settings, and restart the game.

Other information


Technical specs Supported Notes
Direct3D 9 DirectX9 Extended
Shader Model support 3
Executable 32-bit 64-bit Notes


Middleware Notes
Physics Havok
Interface Scaleform, Chromium Embedded Framework
Cutscenes Bink Video
Multiplayer 4Game, ElDewrito ElDewrito Mod is a Requirement to play after shutdown by Microsoft

System requirements

Minimum Recommended
Operating system (OS) Vista
Processor (CPU) Intel Core 2 Duo E6600
Equivalent AMD CPU
System memory (RAM) 4 GB
Hard disk drive (HDD) 4 GB
Video card (GPU) Nvidia GeForce 9600 GT
Equivalent AMD GPU
512 MB of VRAM
DirectX 9.0c compatible
Shader model 3.0 support
Controller XInput Compatible


  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).


  1. Polygon - Russian free-to-play Halo Online canceled - last accessed on 2019-11-23
  2. ElDewrito Blog - Microsoft’s Legal Action and the Future of ElDewrito - last accessed on 2019-11-23
  3. r/HaloOnline - Get Started - last accessed on 2019-11-23
  4. r/HaloOnline - Bi-Weekly Questions, Requests, and Bug Reports Thread. (Oct 24) - last accessed on 2019-11-23
  5. Verified by User:Weion on 2019-01-24
    The RTX crash is fixed by this patch while also not modifying the mtndew.dll file, allowing players to still be fully updated - and fix all known issues of the previous release.