Full list of all 12 Realms of Ancient War achievements worth 200 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
You have completed the game with all heroes
You have played with a friend
You have struck an enemy for 2500+ HP damage
You have raised all of your skills to level 1
You have completed the game a first time
You have equipped a full set of epic or legendary armor
You have found 5 statues of Kilthi
You have possessed 15 mobs
You have completed 50 quests
You have 50,000 gold coins
You've completed a level without once dying
You have killed 1000 mobs in the main campaign