The forum topics are not in the best order, so I've found this question after posting my game release announcement. My game is playable, I cannot call it finished, but I've roughly estimated that it's 50% complete.
I think DONE means: deployable and playable game (or game prototype), even if it's not a merchandise or marketable product.
Of course this also depends on your goal. For marketing reasons, an early prototype may not be announced at all, maybe besides a closed group of members.
Altay Tank Game is just for fun, so I've taken the liberty of announcing it.