What is .AAO file extension?
Map file used by America's Army (AA), a multi-player shooter game released by the US Army; contains a game map, including terrain, buildings, and other objects; used to create and share custom maps.
AAO files are stored in the Maps directory of an AA installation.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.