hello, anyone can help me unpack/decrypt some spritesheets from an APK?

[Mozzaratti]

I made  the apk  file into .zip and extract  it, but the assets  folder is filled  with extensions I never seen before,  anyone could guide me / help me rip the  sprites/spritesheet on these games 

Crimson Hearts 2: https://www.mediafire.com/file/m6vz45i87...s.rar/file
Chroisen Chronicles:https://www.mediafire.com/file/28buobn9bjq8l15/chroisen_assets.rar/file
Inotia 4: https://www.mediafire.com/file/a3udf5vsq...s.rar/file
Illusia 2: https://www.mediafire.com/file/xgmq9xkkt...s.rar/file
Destinia:   https://www.mediafire.com/file/ynxlmzuml...s.rar/file

Thanks so much in advance

I wish I could help. I've been tackling Bloodline: The Last Royal Vampire without a lot of luck. It's not as old as the ones you're working with, but it's still old enough I figured some of the extensions could be extracted from but I've tried multiple programs with no luck success other than the typical icons/loading bits. If I run into something that works with one of these you've uploaded, I'll let you know!