Here is the full list of all 14 Beasts Battle achievements.
Earn all stars.
Go Ridge Hero of a mage on Hard difficulty.
Complete the game for both races.
Apply 2000 magic damage.
Go Ridge Hero of a warrior on Hard difficulty.
Complete the game in any race.
Lose 200 mana.
Complete 10 levels in any race.
Spend 10,000 gold.
Complete 5 levels in any race.
Try hotseat mode.
Apply 5000 physical damage.
Apply 15000 physical damage.
Lose the 2000 health.