Community Announcements [2021-12-21]
Arma 2 Operation Arrowhead Windows 11 Hotfix #2

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. Changelog 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.
Community Announcements [2021-12-16]
Arma 2 Operation Arrowhead Windows 11 Hotfix

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. Changelog 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.
Community Announcements [2019-11-07]
Arma 2 Operation Arrowhead 1.64 Update

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. Changelog 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 ...
Community Announcements [2015-12-21]
Corepatch hotfix

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 messag...
Community Announcements [2015-12-21]
Corepatch hotfix

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 messag...
Community Announcements [2015-12-18]
Christmas update combined with 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...
Community Announcements [2015-12-18]
Christmas update combined with 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...
Community Announcements [2015-10-01]
Minor BattlEye update published

A minor BattlEye update has been published to both main and beta version of Operation Arrowhead.
Community Announcements [2015-10-01]
Minor BattlEye update published

A minor BattlEye update has been published to both main and beta version of Operation Arrowhead.
PC Gamer [2014-07-01]
Arma 2: Operation Arrowhead (and DayZ mod) drop GameSpy, move to Steam

GameSpy recently announced its surrender from the world of digital matchmaking, and, as with any wide-ranging defeat, there are bound to be casualties. Not Arma 2: Operation Arrowhead, though. Bohemia have airlifted their expansion to the safety of Steam. And clinging desperately to it is the DayZ Mod, which, as a dependent of Arma 2: OA, has also been secured. "Besides the numerous fixes and optimizations which were introduced during the 1.63 beta program which covered almost a 2 year period for this iteration of the engine, the update focuses on the transition of the multiplayer from GameSpy matchmaking to Steam," writes Bohemia Interactive's Korneel van 't Land. Naturally, the update requires Steam to function. Those with retail copies can now transfer Arma 2, and all of its DLCs and expansions, by adding their CD Key to Steam's Product Activation. While Bohemia's older games won't be transferring to Steam, Bohemia have created a new Master Server list for server owners to join. U...