The main Atomiswave game data decrypted for MAME use. 2. The BIOS File Filename: awbios.zip
The hunt for on older emulators like MAME4droid (0.139u1) is a classic saga of digital "fool’s gold" and technical workarounds. The Legend of the "Exclusive" ROM metal slug 6 mame 0139u1 rom exclusive
Due to the rules regarding ROM distribution, I cannot provide direct links. However, if you are searching, look for datfiles named: The main Atomiswave game data decrypted for MAME use