The highest score on Pac-Man Championship Edition is 451,660, achieved by Chris ‘dragonangyle’ Zupan (USA), in Tacoma, Washington, U.S.A. on 9 June 2010

http://www.bragster.com/brags/367904

NOTE: This is for a 10 minute run, and is distinct to the 5 minute record present on GWR Challengers.