Above all, remember the legal landscape: support arcade preservation by respecting copyright laws, and consider purchasing official re-releases of classic games when available. The MAME project itself is a legal, open-source emulator; its purpose is preservation, not piracy.
If you are using a split ROM set, running a clone game without the parent ZIP file present will result in an error. For example, trying to play the USA version of Pac-Man without having the puckman.zip parent set present will cause missing files. Solution: either use a full non-merged set (everything is self-contained) or ensure all parent ROMs are present. mame 0139 romset download upd
You cannot delete the parent game. If you delete Pac-Man , your clone versions of Pac-Man will stop working entirely. 3. Merged ROMsets Above all, remember the legal landscape: support arcade
Arcade emulation does not work like console emulation. You cannot simply download a random zip file and expect it to load. MAME checks for exact filenames and file signatures (CRCs) inside the zip. For example, trying to play the USA version