[ACKS] Adventurer Conqueror King System

[Tavis]

I think you are specifically talking about demihuman level limits. I can't opine on this directly - my own campaign has no PCs above 7th level. I do know that Alex's Auran Empire campaign has multiple PCs who "stalled out" well before the rest, and that the players were happy with this - obviously others' experience differs! I can say that this would not be hard to change; the mechanics are compatible with enough older editions & retroclones that swapping out the XP tables would present little challenge and have little impact on the game's economic assumptions.