I've been waiting for a single-player version of Maplestory to come out my entire life.

The overall art/gameplay style is lovely, there's not really a single-player offlin equivalent to the platformer-JRPG thing that I'm aware of.

I recently went back and tried to play it again almost a decade later with my partner (who had never played it) and it was not quite what I remembered.

Fantastic game back then though, as well as "Conquer Online" around the 2007-2009 era.