The Probe UFO is the mascot of Probe Entertainment used for intoductions of Probe games, taking its first apparition in the racing game Extreme-G 2. The UFO would appear in the introduction of Re-Volt, however the Intro Sequence has been removed from the game for a unknown reason (likely due to Probe Entertainment changing its name to Acclaim Studios London), keeping the car just as a unlockable bonus via Cheat Codes. Another way to unlock this car is changing the parameters data. More information on how to do this is avaliable over at the Under The Hood page.