Help us get the next update to Arma 3 in the best possible shape in the weeks before release!

Ahead of main branch updates (usually once per 4 to 6 weeks), we stage the build on a public Release Candidate (RC) Steam branch for testing. This testing period typically lasts 1 to 2 weeks. Its goals are as follows:

  • To truly test the final build publicly. While Dev-Branch allows anyone to try day-to-day changes, that build (configuration) is not 100% identical to main branch, and may contain longer-term experimental features and content.
  • To discover potential issues in the broad and varied player base. This is complementary to our in-house testing by the various QA teams.
  • To allow mod teams and other custom content creators to prepare for changes and adapt their works if necessary.
  • To stress test the multiplayer environment (this is where most of the issues appear, especially at high player counts and long server up times).

Your feedback is important to securing a solid update release, and we appreciate your assistance greatly!


  • Even the RC-Branch may still contain issues that we look to address during the RC period.
  • Multiplayer is not normally compatible with main branch. You may not be able to play on main branch servers, thus restricting you to a smaller range of RC servers.
  • Mods or other custom content may not yet be compatible with the RC.
  • Steam client is limited to one branch being installed at a time, so switching branches involves re-downloading data (see a potential work-around below).
  • Daily updates may occur until the full release, so consider your bandwidth.


Opt into the RC-Branch in your Steam client:

  • Right-click on Arma 3.
  • Select Properties.
  • Access the BETAS tab.
  • Enter the access code (see the box on the right when available).
  • Press CHECK CODE.
  • Select rc - Release Candidate Build from the drop-down list.
  • Let the game update itself to the RC build.
    • To ensure a valid build, consider verifying the integrity of the local game cache using Steam client.

Note: RC-Branch is also available for our Arma 3 Server application on Steam.

You can use our Game Updater tool to install multiple branches on your PC, including RC-Branch. It can be found in the free Arma 3 Tools suite on Steam.


  • The best place to report issues is our Feedback Tracker (how to guide).
    • Please mark your exact version number and usage of RC-Branch clearly.
    • Please also try to replicate the issue in the unmodded build.
    • Please prioritize reports on issues new to the RC build (not present in the actual main branch).
  • The RC build can also be discussed in this forums discussion thread.

Thank you kindly for your help with making Arma 3 a better game!