OptimusPrime1981 10 Posted July 11, 2015 Good afternoon guys, i am new here and have one question. I just downloaded from web site patches for ARMA OA but when i am trying to install or upgrade from Patch 1.55 to 1.59 , i seen the message that some file is missing xdelta3.exe phase5? Also it is same problem with any other patch. Many thanks Share this post Link to post Share on other sites
Richie 330 Posted July 11, 2015 It's all Steam now, grab all updates, installation files and everything else from there. Share this post Link to post Share on other sites
