Has an AFL game ever ended 81-29?
Exactly once. On September 5, 1903, Fitzroy beat Geelong 81-29, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 81-29 in league history.
That makes 81-29 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 82-29 has happened 1 times and 81-30 has happened 1 times.