If you like old-school MMORPGs up to I do, then MU Dark Epoch will scratch that itch rather effectively. Just after actively playing the game for a while, I only just realised it's got codes - and right now, I'm sharing an index of the many MU Dark Epoch codes https://bookmarkspiral.com/story19572699/the-fact-about-mu-dark-epoch-that-no-one-is-suggesting