Are you looking to build a or a curated "Best Of" list ? Do you need assistance setting up MAME BIOS files or CHDs ? Share public link
Because each game's ZIP file is a self-contained unit, you can copy, move, or share individual games without worrying about breaking anything. As the official MAME documentation notes, "A non-merged set is... a good way to go if you want to have very few sets and want everything self-contained and easy to work with". If you only want to play a handful of classic games, you can simply pick their ZIP files from a non-merged set, drop them into your MAME roms folder, and they will just work. non merged mame rom set
The revision chosen by the MAME team as the definitive, primary version of the game (usually the latest world or US release). Are you looking to build a or a curated "Best Of" list
To understand a non-merged set, it's crucial to first know why these formats exist in the first place. MAME uses a parent/clone system to manage the thousands of game variations (different regional versions, bug fixes, bootlegs, etc.). For example, the widely known Pac-Man has numerous versions, like Puck-Man (the original Japanese version) and various bootlegs. To prevent massive duplication of data, MAME allows these "clones" to reference common code or ROM files stored in one "parent" set. As the official MAME documentation notes, "A non-merged
Because every ROM is independent, you can delete any game you don’t want without breaking other games.