Once you have downloaded the custom maps, you’ll need to transfer them to your Xbox One. Look for maps that are compatible with Xbox One. There are various websites and forums where you can find and download these maps. To play custom zombies on BO3 Xbox One, you’ll need to start downloading custom maps from the in-game modding community. If you’re new to custom zombies on Xbox One and want to learn how to play, here’s a step-step guide to help you get started. Custom zombies allow players to create their own unique, challenging, and sometimes even hilarious zombie maps. Call of Duty: Black Ops 3 (BO3) on Xbox One offers players the opportunity to not only experience the thrilling main campaign and multiplayer modes but also dive into the exciting world of custom zombies.