: The same game listed multiple times under different names.
In reality, these collections often use "bank switching" technology to cram multiple programs into one ROM. While the label promises 300 unique experiences, many of these "games" are actually: 300 in 1 nes rom
While every 300-in-1 variant (like the famous "Well 93" version) differs slightly, they generally draw from a predictable pool of early 8-bit classics. If you load up one of these ROMs, you are highly likely to find: Multicarts | BootlegGames Wiki : The same game listed multiple times under different names
The Ultimate Guide to the 300-in-1 NES ROM: Retro Gaming in a Single File 300 in 1 nes rom
: Simple, early Famicom titles or homebrew "Nice Code" games that take up very little memory. Common Games Found in 300-in-1 Collections