Lanefan
Victoria Rules
A TPK is always, objectively, a failure or "loss" condition regardless how it was arrived at.Again, I think we have a failure to communicate, which I can point out by noting:
1. A TPK may, or may not, be a failure condition in D&D (think "heroic last stand and sacrifice").
Note that this is different from a 'moral victory' where one takes a loss and spins it in a positive manner.
Same thing as getting checkmated in chess. You could have pulled off some of the best moves of your life trying to defend your king but, objectively and even though you can claim a moral victory by your fine late-game play, in the end you still lost.