I used to play this game a lot as a kid with my girlfriend and her siblings. We had a pretty active guild which if I remember correctly was called Blood Knights. One of the main things that drew us to the game was the huge raids which is where I learnt that I was an amazing tank. There's also a marriage system in this game which is pretty cute as well as player shops where players can buy loot and equipment that other players are selling.
When I originally played there were only 4 classes and they were the classic Warrior, Mage, Archer and Cleric, now they have added a 5th class called Trickster which I have no experience with.
The level cap for the game is either 120 or higher from what I can remember and it takes forever to get to that point because of how little XP you gain the further in you get. There is no pay to win and pretty much everything can be found in game for free apart from a few cosmetic things.