Here is the full list of all 12 Mortals and Monsters: Blood Orc achievements.
Complete the dwarven province.
Complete the orc province.
Complete the undead province and complete the game.
Kill a giant.
Kill a manticore.
Kill a vampire bride.
Kill 500 goblins.
Kill 1000 goblins.
Kill 2000 goblins.
Kill 250 skeletons.
Kill 500 skeletons.
Kill 1000 skeletons.