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, a type of unauthorized cartridge designed for the Nintendo Entertainment System (NES) or Famicom that contains hundreds of classic 8-bit titles. These ROMs are widely used in handheld retro consoles like the SUP Game Box Overview of the 400-in-1 Multicart The most famous version is the CoolBoy 400-in-1 Real Game , released by the developer Renshun. : Approximately , which was exceptionally large for the Famicom/NES era. Game Composition : While it claims 400 games, many are or slight hacks of the same titles. Developers

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The original is one of the most famous of these pirate cartridges, made by an unknown manufacturer around 1992. If you grew up playing on a Famiclone (a non-Nintendo NES clone console), there's a good chance you had a cartridge like this. However, there's a catch. The "400" number is a marketing gimmick. Despite the title, the original cartridge does not contain 400 unique games. It actually contains only 12 core titles , with the rest of the slots being repeats of those games accessible through different menu options. The game list on the original 400-in-1 cartridge is a time capsule in itself, including: , a type of unauthorized cartridge designed for

The Ultimate Guide to 400-in-1 NES ROM Downloads: Relive the Golden Age of Gaming Game Composition : While it claims 400 games,