190-in-1 NES ROM (often specifically the "Super 190-in-1" or "Gaishi 190-in-1") is an unlicensed multicart released in the early 1990s, likely developed by Supervision

The "190 in 1" designation is a classic marketing tactic. While the menu screen might list 190 entries, the actual content was rarely that diverse. These carts relied on repetition to fill space.

The "190 In 1 Nes Rom 18" has gained immense popularity among retro gaming enthusiasts due to several reasons:

Contains the core unique games and standard versions.