You're looking for Sega Naomi ROMs!
These are usually found in MAME-style ROMsets (e.g., gdrom.zip , spikersb.zip ).
The reigning king of NAOMI, Naomi 2, and Atomiswave emulation. It is open-source, highly accurate, features netplay for multiplayer, and runs flawlessly on low-end hardware, including Android devices and single-board computers like the Raspberry Pi.
The list of confirmed NAOMI-exclusive titles is relatively small, but it includes several noteworthy games: sega naomi roms exclusive
A unique "safari simulation" where you chase and lasso wild animals. It stayed exclusive to arcades for years, only seeing a late, modified version on the Wii.
To understand the exclusives, you must understand the hardware. The NAOMI was modular. It ran on a GD-ROM drive (discs) or a "Cartridge" ROM board. While the Dreamcast shared the same CPU (Hitachi SH-4) and GPU (PowerVR2), the NAOMI often had more RAM, a higher clock speed, and specialized I/O boards for light guns, force feedback steering wheels, and card readers.
The NAOMI was also versatile in its media format. Games could be distributed on either ROM boards (cartridges) with a maximum capacity of 172 MB or on GD-ROMs (Gigabyte Disc Read-Only Memory). When using GD-ROMs, the system would load the entire game into memory at startup to reduce wear and tear on the optical drive and to ensure fast, reliable gameplay. You're looking for Sega Naomi ROMs
While Zombie Revenge technically received a Dreamcast port, the NAOMI arcade ROM remains highly sought after by purists. The arcade version features significantly higher difficulty scaling, uncompressed audio tracks, and graphical textures tailored specifically for arcade CRT monitors, offering a grittier visual presentation. How to Emulate NAOMI Exclusive ROMs
Groups like Trurip and the NAOMI Preservation Project have spent the last five years dumping rare cartridges. Their goal is simple: by the 30th anniversary of NAOMI in 2028, every exclusive will be playable on a Steam Deck or PC.
The success of NAOMI led Sega to create several specialized versions that are even harder to emulate: It is open-source, highly accurate, features netplay for
Traditional ROM dumps from the physical arcade cartridges.
Because NAOMI games were distributed via both ROM cartridges and GD-ROM discs (using the NAOMI DIMM board), the emulation scene categorizes these files as either .bin/.dat ROM sets or .gdi/.chd disk images. Top Sega NAOMI Exclusive Games You Must Try