Here is the full list of all 51 Battle For Crown: Multiplayer achievements.
Have you received the CROWN?
Your kingdom is amazing!
There is no second prize for losers in war
You found the troll!
You have found a wizard!
You found the bull!
You have found an archer!
You have found a swordsman!
You have found a viking!
You have found the skeleton!
You found the golem!
You have found a cavalryman!