Here is the full list of all 33 Undead Horde 2: Necropolis achievements.
Reclaim the Necropolis Throne.
Enter Citadel.
Craft an item with three affixes.
Reset your upgrade cards.
Survive 2 minutes in the Necrodome.
Fully restore every building in Necropolis.
Conquer all levels in Citadel.
Kill the Archmage.
Include 5 different unit types in your horde.
Conquer all levels in Desert.
Conquer all levels in Winterlands.
Obtain 15 unique rune powers.
Dig up 10 buried treasures.
Conquer all levels in Darklands.
Assign 5 nobles to council seats.
Enter Desert.
Unlock 10 different unit types.
Upgrade a unit building to level 3.
Slay the mythical Beast of Carmague.
Gain 100,000 gold.
Complete all merchant's quests.
Destroy a Freezing Monolith.
Find a noble soul jar.
Enter Winterlands.
Die for the first time.
Reach Level 6.
Stop the elven ritual and kill the ancient fire elemental.
Solve the puzzle in Forgotten Crypt.
Restore 10 buildings in Necropolis.
Uncover 5 secrets.
Acquire your first talent.
Claim Scavengers' Bog.
Enter Darklands.