The Hyperdrive Add-on for Interstate Drifter 1999 has 18 achievements.
unlocks color palette
unlocks screen effect
unlocks little two player cars
unlocks.. something
unlocks FAD '69
unlocks Tuk-Tuk Turbo
unlocks UFO
unlocks Panzerwagen
unlocks nothing
Unlocks Laser Bike
unlocks Pooper 2.0