The Expansion Pak is a memory expansion that plugs into the N64 console’s memory expansion port in the place of the Jumper Pak. It is a system upgrade for the Nintendo 64 that doubles the console’s RAM storage capacity to 8 MB. The add-on was released in 1999 and contains 4MB RDRAM, the same type of memory used inside the console itself. 

The Expansion Pak is installed in a port on top of the Nintendo 64 and replaces the pre-installed Jumper Pak. 

Games that are enhanced but not required to play with expansion Pak are:

  • Aidyn Chronicles: The First Mage
  • Gauntlet Legends
  • Hybrid Heaven
  • Pokémon Stadium 2
  • Resident Evil 2
  • Road Rash 64
  • Shadow Man
  • Star Wars: Episode I Racer
  • Turok 2: Seeds Of Evil
  • San Francisco Rush 2049
  • South Park

Games that require the Expansion Pak to play are:

  • Donkey Kong 64
  • Single-Player Mode Of Perfect Dark
  • Multiplayer Mode Of Starcraft 64
  • The Legend Of Zelda: Majora’s Mask

For a guide on how to install the Expansion Pak see here.