I did. It’s one of the F2P MMOs I spent some time with after my first time playing WoW but before I could pay for the sub myself (I was young and my parents didn’t want to pay monthly for a game at the time).
Anyway, literally the only reason I bring this up is because I found this orchestral cover of an unrelated song a few days ago:
It is unintentionally the exact vibe of the Knight Online OST, and I found that interesting.
Goodbye.