You can opt to not install BE by going to your game directory, to the folder called battle eye and running the uninstall battle eye bat as well as changing the BELauncher ini file from silentinstall=1 to silentinstall=0 and then edit the launch options by going to GRB in your steam library, right clicking it and under the general tab add in the command " /belaunch -be " close out of that window and now when you launch GRB hit cancel on the pop up instead of “install battle eye” and should be good to go ( no online play obviously) - I personally haven’t tested it so do with the info as you please for the steam users but do it at your own risk and understand the possible consequences.
- Currently playing steam version with this set up with no issues so far will update if anything changes.