Head On, COngo Bongo and More
I do believe that Fred (\"Carnival\") Pastore can give Chris' record a run should he ever be presented with a chance at the arcade classic. He hit 300K+ on \"Crash\" on MAME, after all, and they are virtually identical.
And don't forget...Fred's \"Carnival\" score is also in a class of it's own.
Jason's 1.5M on \"Congo Bongo\". I saw what he did, having verified the tape. His game did come to an end, but he point-pressed in ways that I I never thought were possible. That will be one tough score to take down.
George Strain's 800K on 2nd-life/intentional kill of game score on MAME \"Jungle Hunt\" is another tough one. No way to know for sure how high he could have taken that one. However, it's a Taito game and it might have stopped at 999,900 or so. The only active player with a shot at that one (arcade equivalent) is Shawn Cram.
Dwayne made a run at \"Nibbler\" awhile back within the past 18 months...he came close but his blisters caused an unexpected early conclusion. Dwayne has a shot at that one. So I'd suggest that the Tim McVeigh \"Nibbler\" score is within reach, it's just a matter of when.
But Phil Britt's \"Paperboy\" grand slam score, of all the scores mentioned in this thread, I think this one's definitely going to stand the test of time.