Fame is the currency besides Realm Gold, but unlike Realm Gold, Fame can only be achieved by playing the game itself. You have to die to collect what you've earned as each character. Fame can be spent on feeding or fusing pets
Fame can be gathered from defeating monsters. The harder the monsters you fight, the faster you gain fame.
At first, you won't be able to keep track of how much fame you earn. After you reach level 20 (the maximum level), you will see an orange bar replace the green one that shows your experience. This bar shows how much fame you have when you mouse over it, and will fill up as you gain fame for the particular character you're playing as.
If you complete enough class quests (completed by gaining a certain amount of fame for a character), your "star" will change color. This star shows how many class quests you have completed. You start off with a pale blue star. The highest level star is the white star. Your star is shown beside your name on the main screen. Stars are required for some basic functions of the game.
Fame used to be used to buy keys to dungeons, but with recent updates it can now only be used for feeding or fusing pets.