This hotfix for Arma 2: Operation Arrowhead resolves a few issues with the original Windows 11 update and brings a quality-of-life change to the branch configuration.

We are adding the new Windows 10 and 11 compatible BattlEye files to Arma 2 OA's /Expansion folder to ensure functionality with older setups.

We are also removing password protection from the branch 163_backup which contains 1.63 version of Arma 2 OA. This is to ensure compatibility with Linux servers still running on the 1.63 version.


BattlEye
- Added new client binaries and libraries to the Arma 2 Operation Arrowhead Expansion folder.

Steam Branch Configuration
- Removed password protection from the 163_backup branch, which contains the latest build of Arma 2 OA 1.63.

In cooperation with the BattlEye team, we have prepared a hotfix for Arma 2 Operation Arrowhead.
This hotfix adds BattlEye support for Windows 11.


If you experience issues with this Operation Arrowhead update, we have made a "legacy" version available on Steam.

To download this build, please go to your Steam library, right-click on Arma 2: Operation Arrowhead, select "Properties".

In the Properties window select the "BETAS" tabs, and use the drop-down menu to select "legacy".

After you click on the "Close" button, Steam will automatically begin to download the previous version of the game.



BattlEye
- Updated client binaries and libraries.
- Updated server libraries for both Windows and Linux.
- Support for a new version of Windows 10 and 11 operating systems.

In cooperation with the CorePatch team, we have prepared update 1.64 for Arma 2: Operation Arrowhead, which takes care of many issues, including Windows 10 support.

If you experience issues with the recent Operation Arrowhead update, we have made a "legacy" version available on Steam. To download this build, please go to your Steam library, right-click on Arma 2: Operation Arrowhead, select "Properties". In the Properties window select the "BETAS" tabs, and use the dropdown menu to select "legacy". After you click on the "Close" button, Steam will automatically begin to download the previous version of the game.




Engine
- Security fixes
- Many crash fixes
- Various minor fixes
- Several optimizations
- Fixed: black eyes on characters
- Fixed: multiple VON issues
- Fixed: Event Handlers not resetting properly
- Fixed: MP Event Handlers re-indexing
- Fixed: vehicle turret locality sync in multiplayer
- Fixed: drawIcon displaying text
- Fixed: isNumber return
- Fixed: helicopter rotor speed after MP mission loading from a save
- Fixed: laser targets on water surfaces
- Fixed: particles drawn near the camera
- Fixed: AI gear in another group's vehicle
- Added: bonus script commands getHit, addWeaponTurret, removeWeaponTurret
- Added: #maxping, #maxpacketloss and #maxdesync commands for admins (for server.cfg too)
- Added: kickClientsOnSlowNetwork and disconnectTimeout for server.cfg


BattlEye
- Newly located /BattlEye/ folder in the root of /Arma 2 Operation Arrowhead/
- Updated client binaries and libraries
- Updated server libraries for both Windows and Linux
- Support for a new version of Windows 10 OS


Allocator
- Updated the memory allocator library (same as Arma 3) in /Arma 2 Operation Arrowhead/Dll/: /tbb4malloc_bi.dll


Steam
- Updated Steam SDK libraries to 1.42 in the root of /Arma 2 Operation Arrowhead/:
/steamclient.dll
/tier0_s.dll
/vstdlib_s.dll
/steam_api.dll
/steam.dll


Data
- New version of signed files:
/Expansion/Addons/corepatch.pbo
/Expansion/Addons/warfare2_e.pbo
/Expansion/Addons/warfare2.pbo
/Expansion/Addons/modules_e.pbo
/Expansion/Addons/language_e.pbo
/Expansion/Addons/language.pbo
/Expansion/Addons/languagemissions.pbo
/Expansion/Addons/languagemissions_e.pbo
/Common/modules.pbo
/Common/missions.pbo

Note: minor tweaks were done to Arma 2 data language files for synchronization with Arma 2 Operation Arrowhead.


CorePatch
Includes hundreds of various config or script tweaks and fixes from the past years.
More details here: https://github.com/Goliath86/CorePatch/blob/master/Changelog.txt
Credits: https://github.com/Goliath86/CorePatch/blob/master/Credits.txt


Credits & Thanks
Goliath86 for all his work on CorePatch
.kju for a very long list of errors
Rob Graham (eggbeast) for Dwarden's script to fix the Fire-In-The-Sky bug
Dwarden for his Fire-In-The-Sky script bug fix and support
OPUSfmSPol for a very long list of errors and their fixes of the Warfare module
Wolffy.au for the BIS Module Improvement Project
zGuba for the BIS Module Improvement Project
Defunkt for his ANZINS mod
OMAC for his support on bug fixing
Dimon for his support on bug fixing
Xeno426 (Xenomorph) for suggestions, improvements, bug fixing in CCP
Sa-Matra for his support and help on bug fixing
Schatten for his support and help on bug fixing
groove_c for his support and help on bug fixing
PiZZADOX for his support and help on bug fixing
All the contributors of the Community Configuration Project
All the contributors of the Community Issue Tracker
All the players who tested / reported on the Bohemia forums, e.g. https://forums.bohemia.net/forums/topic/188702-a2a2oa-beta-corepatch-01032016/
Everyone who supported or helped and was not yet mentioned.

Based on community feedback the Corepatch team has released a small hotfix, which takes care of some of the most prominent issues.

If you are having issue with the recent Operation Arrowhead patch or this hotfix, we have enabled "legacy" beta. To download it go to your steam library, click with the right mouse button on Arma 2: Operation Arrowhead, select properties. In the properties window select tab "BETAS" and from the dropdown list choose "legacy". After clicking on the Close button Steam will download the previous version of the game.

Changelog:
- AS50 sound reverted to original
- DMR zeroing removed due to community requests
- Burst lengths decreased for aircraft cannons
- Lee Enfield zeroing reverted to original state
- NVG is now usable with western scopes again
- Helicopter side gunners firing angles reverted to original
- All An-2 variants are now retexturable through hidden selections
- GMG and AGS-30 zeroings fixed, no longer include unusable values
- "No Owner" RPT messages should no longer appear
- All patches are merged into single addon

Based on community feedback the Corepatch team has released a small hotfix, which takes care of some of the most prominent issues.

If you are having issue with the recent Operation Arrowhead patch or this hotfix, we have enabled "legacy" beta. To download it go to your steam library, click with the right mouse button on Arma 2: Operation Arrowhead, select properties. In the properties window select tab "BETAS" and from the dropdown list choose "legacy". After clicking on the Close button Steam will download the previous version of the game.

Changelog:
- AS50 sound reverted to original
- DMR zeroing removed due to community requests
- Burst lengths decreased for aircraft cannons
- Lee Enfield zeroing reverted to original state
- NVG is now usable with western scopes again
- Helicopter side gunners firing angles reverted to original
- All An-2 variants are now retexturable through hidden selections
- GMG and AGS-30 zeroings fixed, no longer include unusable values
- "No Owner" RPT messages should no longer appear
- All patches are merged into single addon

A 160MB data patch ensuring Arma 2's compatibility with the recent Arma 2: Operation Arrowhead update has been released.

A 160MB data patch ensuring Arma 2's compatibility with the recent Arma 2: Operation Arrowhead update has been released.

After a prolonged beta, the latest Arma 2: Operation Arrowhead patch has finally matured and reached its release phase. It includes several engine fixes listed in the changelog below. On top of that, we have included “CorePatch” and “CorePatch2” data patches developed by members of the community. Huge thanks and credits to Goliath and SaMatra and several other devoted community developers (for full credits, please see the changelog).

in case you experience any issue, leave us your feedback in this thread.

Arma 2: Operation Arrowhead 1.63.131129 engine fixes:

• added hardcoded query port at UDPport+1
  
• added check NAN (not a number)
  
• fixed squad logo/xml crashes and issues
  
• fixed CU-RE-L exploit vs BattlEye logging
  
• fixed server no more loads client profile
  
• fixed destroyed structures damaging JIP clients
  
• fixed random server \KEYS\ errors with .bikey files
  
• optimized query traffic
  
• additional crash fixes

CorePatch Changelog is too long for Steam announcement so, please, check it out at our forums
CorePatch credits:

• Goliath6 for his all work on CorePatch for A2, A2: OA
  
• Sa-Matra for his support and help on bug fixing (+ all work on CorePatch2)
  
• groove_c for his support and help on bug fixing
  
• Schatten for his support and help on bug fixing
  
• .Kju who provided a (very!) long list of errors
  
• Rob Graham (eggbeast) who provided Dwarden's script to fix the Fire-In-The-Sky bug
  
• Dwarden for his Fire-In-The-Sky script bug fix and his support
  
• OpusFmSPol who provided a very, very long list of errors and their fixes of the warfare module
  
• Wolffy.au and zGuba for their BIS Module Improvement Project (https://dev.withsix.com/projects/mip) that even inspired me
  
• Defunkt for his Anzins mod included in CorePatch
  
• OMAC for his support on bug fixing
  
• Dimon for his support on bug fixing
  
• Xeno426 (Xenomorph) for his suggestions, improvements and bug fixing in the CCP Project
  
• All the contributors of the CCP Project
  
• All testers and supporters of Corepatch

After a prolonged beta, the latest Arma 2: Operation Arrowhead patch has finally matured and reached its release phase. It includes several engine fixes listed in the changelog below. On top of that, we have included “CorePatch” and “CorePatch2” data patches developed by members of the community. Huge thanks and credits to Goliath and SaMatra and several other devoted community developers (for full credits, please see the changelog).

in case you experience any issue, leave us your feedback in this thread.

Arma 2: Operation Arrowhead 1.63.131129 engine fixes:

• added hardcoded query port at UDPport+1
  
• added check NAN (not a number)
  
• fixed squad logo/xml crashes and issues
  
• fixed CU-RE-L exploit vs BattlEye logging
  
• fixed server no more loads client profile
  
• fixed destroyed structures damaging JIP clients
  
• fixed random server \KEYS\ errors with .bikey files
  
• optimized query traffic
  
• additional crash fixes

CorePatch Changelog is too long for Steam announcement so, please, check it out at our forums
CorePatch credits:

• Goliath6 for his all work on CorePatch for A2, A2: OA
  
• Sa-Matra for his support and help on bug fixing (+ all work on CorePatch2)
  
• groove_c for his support and help on bug fixing
  
• Schatten for his support and help on bug fixing
  
• .Kju who provided a (very!) long list of errors
  
• Rob Graham (eggbeast) who provided Dwarden's script to fix the Fire-In-The-Sky bug
  
• Dwarden for his Fire-In-The-Sky script bug fix and his support
  
• OpusFmSPol who provided a very, very long list of errors and their fixes of the warfare module
  
• Wolffy.au and zGuba for their BIS Module Improvement Project (https://dev.withsix.com/projects/mip) that even inspired me
  
• Defunkt for his Anzins mod included in CorePatch
  
• OMAC for his support on bug fixing
  
• Dimon for his support on bug fixing
  
• Xeno426 (Xenomorph) for his suggestions, improvements and bug fixing in the CCP Project
  
• All the contributors of the CCP Project
  
• All testers and supporters of Corepatch

A minor BattlEye update has been published to both main and beta version of Operation Arrowhead.