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My first and favorite mmo was Anarchy Online. The skill system was so complex and there were so many complex aspects that made the game entierly unique to the genre of mmos.
"Twinking" was not as simple as getting to a certain level and rightcliking a piece of gear that you farmed with the level req on it. It was a process that took many items and involved a lot of math and planning ahead to achieve your desired setup.
So I'm asking is there another MMO with an indepth complex skill system where you are able to have full control of a character's stats to the degree of Anarchy Online or something similarly complex.