The OA2 file extension is related to the B.O.U.T. Evolution MMORPG (massively multiplayer online role-playing game) and used for its files that store textures in low resolution.
There is one other file type using
the OA2 file extension!
.oa2 - Fujitsu OASYS 2 document file
OA2 file extension - B.O.U.T. Evolution low res texture file
What is oa2 file? How to open oa2 files?
File type specification:
The OA2 file extension is associated with the B.O.U.T. Evolution MMORPG.
The .oa2 files contain low resolution textures, usually in JPEG file format with OA2 file extension. The low resolution textures are used when the game is running on low graphic settings. The high resolution texture files have the OA0 file extension instead.