However, the MAME 0.34 ROM set is a historical document. It represents the moment when a teenager in their bedroom could suddenly play Teenage Mutant Ninja Turtles for free, without needing a bucket of quarters.

If you downloaded a clone but didn't have the parent ROM, the game simply wouldn't show up in the list. There was no friendly GUI warning. You just saw a missing entry.

Released in the early autumn of 2000, MAME (Multiple Arcade Machine Emulator) version 0.34 was far from the most accurate or complete build in the project’s history. It didn’t support CHD (Compressed Hard Disk) images, couldn’t emulate 3D polygonal games like Virtua Fighter , and choked on anything with a protection microcontroller.

In MAME 0.34, to save space, the devs used a strict file structure. A "parent" ROM contained the main program code, while "clones" (like Street Fighter II': Champion Edition ) contained only the differences from the parent ( Street Fighter II: The World Warrior ).

The MAME 0.34 set clocked in at roughly compressed. This was the sweet spot. It was small enough to fit on a handful of CD-Rs or a weekend-long eMule download, but large enough to contain the absolute golden age of arcade gaming.