, you need a "CHD" file. Place the CHD inside a folder named exactly like the parent ROM (e.g., /roms/kinst/kinst.chd 4. Advanced: Samples and High Scores Some early games (like Donkey Kong ) require a separate folder containing files for specific sound effects to work. High Scores: To save your scores, ensure your emulator has the hiscore.dat file enabled in the core options. best arcade games included in this specific set for your first play session? MAME Full Setup Guide