hawkeyefan
Legend
I might be using a more specific definition of "milestone." If you get n XP for finding something new, that's not milestone XP, that's an XP policy that rewards exploration. A milestone, to me, suggests by it's very name that it is a step toward some specific goal, which itself implies a specific path.
Yeah, milestone has that kind of linear element to it. I know folks don’t always mean it that way, but it’s implied.
I can’t stand the D&D XP system, so I always prefer an alternate take. We typically have handled it in a more loose way. Almost breaking the game up into smaller chunks that we’d consider “an adventure”, and then leveling up after an adventure or two. It’s imprecise, and requires a lot of input from the GM, but it’s better than tracking XP per monster defeated, etc.
Spire: The City Must Fall uses a kind of milestone-ish type of system, except it’s about the PCs changing the city. If you complete a session, and you can say “we changed the city” then you get an advance. There are minor, medium, and major advances, depending on how significant the change to the city is. Minor changes are those that affect a small area or neighborhood, medium affect a whole city district or two, and major are citywide. Note, the change need not be an improvement. So if the PCs remove a local crime boss in their district, they’d likely get a medium advance as a result.
This system works well with the game because it incentivizes the main focus of play but in a very broad manner. The goal of Spire is to resist the rule of the high elves. So the advancement system incentivizes players to have their characters try and effect change, but doesn’t stipulate how to do so, and may not even be concerned with success or failure.