N64 Expansion Pak

The N64 Expansion Pak is a memory upgrade for the Nintendo 64 that doubles the console's RAM from 4MB to 8MB. Required for games like Donkey Kong 64, The Legend of Zelda: Majora's Mask, and Perfect Dark, it was an essential accessory for any serious N64 owner. Original Nintendo-branded units with the distinctive red top and ejector tool are the most desirable — third-party alternatives exist but collectors prefer the genuine article.