Age of Empires: Castle Siege

as you complete multiplayer battles you win a certain number of crowns, depending on how powerful the other player is relative to you. it is displayed with the enemies stats on the left during battle. you can also win or lose crowns from having other players attack you, even while away and not playing the game. during age 2 i had reached about 55 crowns and was winning every battle. no one that i attacked would increase my crown level. once i reached age 3 i was earning about 5 per battle, but that went down to 4, then 3 as i approached 100. the achievement unlocked for me when i hit 90 crowns, because i had earned a total of 100, but lost 10. you can track your progress by pressing the little "social" button in the bottom right. it looks like 3 little people, or lowercase letter "i"s.