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Open-source realism mod for Arma 3
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ACE3 Version ACE3 Issues ACE3 Downloads BIF Thread ACE3 License ACE3 Slack ACE3 Build Status

Requires the latest version of CBA A3.
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ACE3 is a joint effort by the teams behind ACE2, AGM and CSE to improve the realism and authenticity of Arma 3.

The project is entirely open-source and all contributions are welcome. Feel free to maintain your own custom version, so long as the changes you make are open to the public in accordance with the GNU General Public License (GPLv2).

The mod is built modularly, so almost any included PBO can be easily removed from the configuration. This way, a team can maintain its own tailored version of ACE3 by simply excluding any components they don't need, or those possibly in conflict with other mods. Modules themselves, e.g. the medical system, also include various customization options, allowing mission designers to tweak the overall experience.

Core features

  • Brand new 3D interaction/action system
  • Performance and reliability framework
  • Focus on modularity and customization
  • New flexible client and server settings & configuration
  • Improved medical system with various levels (basic/advanced) focus on gameplay/realism
  • Proper & consistent network-synced weather
  • Wind and weather-based ballistics
  • Captivity system
  • Explosives system, including different trigger types
  • Map screen improvements – marker placement and map tools
  • Logistics
  • Advanced missile guidance and laser designation

Additional features

  • Carrying and dragging
  • Realistic names for vehicles and weapons
  • A fire control system (FCS) for armored vehicles and helicopters
  • Realistic ballistics/FCS calculated in C/C++ extensions
  • Backblast area and overpressure simulation
  • Disposable launchers
  • Realistic G-forces
  • Vehicle locking
  • Realistic night and thermal vision modes
  • Magazine repacking
  • Realistic weapon overheating mechanic
  • Combat deafness (temporary loss of hearing) simulation
  • Improved interactions for AARs and ammo bearers
  • Adjustable sniper scopes
  • No idle animation with lowered weapon
  • No talking player avatar
  • Jumping over obstacles, climbing over walls and cutting down fences
  • Vector, MicroDAGR and Kestrel devices
    and much more...

Getting started

ACE3 requires Arma 3 and the latest version of CBA A3. See the following pages for help and information on how to get started with ACE3:


You can help out with the ongoing development by looking for potential bugs in our code base, or by contributing new features. We are always welcoming new pull requests containing bug fixes, refactors and new features. We have a list of tasks and bugs on our issue tracker on Github. Please comment on issues if you want to contribute with, to avoid duplicating effort.

Contribution guidelines

To contribute something to ACE3, simply fork this repository and submit your pull requests for review by other collaborators. Remember to add yourself to the author array of any PBO you will be editing and the AUTHORS.txt file; including a valid email address.

Submitting issues and requesting features

Please, use our Issue Tracker to report a bug, propose a feature, or suggest changes to the existing ones. See also:

Testing & building

To help us test the latest development changes, download our master branch (directly, or with git), then assemble a test build:

Get in touch

Slack We have a public Slack team that anyone can join. This is where all our developers and contributors hang out and where we make announcements
Twitter You can follow our Twitter account to get updates and various links to guides
Facebook You can follow our Facebook account to get updates and various links to guides
Bohemia Forum We have a dedicated thread on the Bohemia Forums for the ACE3 project


ACE3 is licensed under the GNU General Public License (GPLv2).

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