Help in ripping japanese version android game [Arknights]

[Lo0bo0]

Download the game apk, and extract it. Then search for the obb file and extract it too using 7zip or any other decompressor. You´ll find all the assets in .ab extension, use AssetStudioGui to see the content of the files and extract them, there are all the sprites, bg, maps and art.

If you still have any questions DM.