The quality control for a 200-in-1 game was non-existent. Because the components were cheap, you often faced the "Glitch Bible":
Yet, for every broken game, there was a hidden gem like Kickle Cubicle or Fire 'n Ice—games so obscure that the multicart was the only way most Americans ever played them. 200 in 1 game
Original NES cartridges contained a single game, often with custom chips (mappers) to enhance graphics and sound. A "200 in 1" cart worked by: The quality control for a 200-in-1 game was non-existent
The logic of the 200-in-1 is brutally simple. In 1988, a single licensed Nintendo game cost roughly $50 (nearly $130 today with inflation). For a kid mowing lawns, that meant you bought maybe three games a year. Enter the grey market multicart. Yet, for every broken game, there was a
Vendors in Hong Kong and Shenzhen realized they could exploit the primitive memory mapping of the 8-bit console. By using a bank-switching chip, they could cram dozens, sometimes hundreds, of ROMs onto a single piece of silicon.
But here is the secret that veterans know: No 200-in-1 cartridge ever truly contained 200 unique games.