Lineage: The Blood Pledge (1998)

In this online RPG of Korean origin, the player can explore the medieval world of Lineage as one of the four available character classes: elf, knight, prince, or wizard. Knights are physical fighters, wizards are proficient in magic, while playing as an elf or a prince require a combination of both. After you create a character, your main goal in the game will be to gain enough experience and to join one of the existent blood pledges, which are equivalent to guilds in other games. As a prince, you can also create your own blood pledge.