Expansion Pak

The Expansion Pak is a RAM add-on for the Nintendo 64 game console, released in 1998. It gives the Nintendo 64 a extra 4MB of RDRAM, for a total of twice the original (4MiB) of on-board RAM. This allows for greater screen resolution, more detailed graphics, and a higher framerate. The Nintendo 64DD was the initial reason the pak was made, because the extra RAM would be required to run the add-on.

The only games that require its use are The Legend of Zelda: Majora's Mask and Donkey Kong 64 (originally the Expansion Pak was included with purchase of the latter). The Expansion Pak was utilized in The Legend of Zelda: Majora's Mask for more onscreen characters at one time, as shown in Clock Town. Also, without the add-on, most of Perfect Dark is inaccessible (including the single player mode). It was also used in Starcraft 64, to unlock levels from the popular Brood War add-on for the PC-version of the game.