The quest is that, quests. I'm creating something where a user gets a badge/icon/bonus/achievement points for completing X,Y,Z. For example "Congratulations, you've won 10 battles". Which would, for example. Earn 5 achievement points? And unlock a prize or icon or something in the achievement directory?
In reference to the questing. They could also earn one for completing 10 quests, helping X find their pebbles etc. :)