I'd like to put some arcade games on this thing, but I'm lost in a maze of twisty passages, all alike.

The docs seem to say that there are 12 (twelve!!) different builds of MAME included in this thing? And I'm supposed to mix-and-match ROM sets with emulators somehow? Or it magically figures it out? Or something?

Let me ask a simpler question. Say I want to start with just a small set of early 80s games, let's say, Star Wars, Tempest, Millipede, Pac-Man, TRON, Joust. Can someone point me at the proper archive.org URL to download that works with "RetroPie 4.1.1, RPI 4/400"?

And also what folder do they go in, and do I have to edit config files or some shit?

Do things work completely differently for the vector and raster games, he asked with great trepidation?

Previously.