Copy the zipped ROM files into the roms folder within the MAME4droid folder. Step 4: Refresh and Play Open MAME/MAME4droid. Select "Refresh" or "Scan" to detect the new games. Your games should now appear in the list. Important Tips for a Smooth Experience

Copy your v0.139 .zip game files directly into that roms folder.

to extract the archive. This will typically result in a folder containing thousands of individual do not unzip these individual game files Install a Compatible Emulator (specifically version 0.139) or with the "MAME 2010" core, which is based on v0.139. MAME4droid (0.139u1) from the Google Play Store. Place ROMs in the Correct Directory Move your game files into the folder within your emulator's installation directory (e.g., C:\MAME\roms Scan and Play

A set means that every .zip file is a complete, standalone game . Each zip contains the game's base code, clone code, and any required BIOS files. With this set, you can simply drag & drop the individual game zip into your emulator's rom folder and play, without hunting for parent files.