Depending on your version of the game, there are three primary ways to acquire these files: Steam Workshop (Recommended) : The easiest way to get zone files for custom maps. Navigate to the Black Ops III Steam Workshop Browse for a map and click
90% of zone file errors are fixed by and ensuring your game is updated. The other 9% are fixed by unsubscribing/resubscribing to custom maps. The remaining 1% (specific legacy custom zones) can be found on trusted modding forums. call of duty black ops 3 zone files download