The Rumble Pak is a removable device which provides force feedback while playing video games. Games that support the Rumble Pak cause it to vibrate in select situations, such as when firing a weapon or receiving damage, to immerse the player in the game. The Nintendo 64 Rumble Pak controller accessory instantly transmits all the bumps and blasts during the action. It's a new jolt to your game play experience. Third-party, made by Detroit Packing Co.