Here is the full list of all 33 BlitzKeep Unleashed achievements.
Defeat the Crustacean Commander without losing.
Defeat the Granite Gurkhan without losing.
Defeat the Ectoplasmic Emperor without losing.
Defeat the Toadlike Tsar without losing.
Defeat the Malicious Maharaja without losing.
Defeat the Owlish Overlord without losing.
Defeat the Demonic Duke without losing.
Defeat the Skeletal Sovereign without losing.
Defeat the Blitz Mage without losing.
Have your first hero fall in battle. It's all right, someone will replace you...
Have many heroes fall in battle. Good thing it's a big family...
Add a second class to your repertoire.
Buy every single class, and unlock a million ways to tackle the island!
Buy an upgrade to make your life easier.
Max out an upgrade. When you do, you should be able to barrel through!
Buy a second spell. Might I suggest fireball?
Buy every spell. With all of them at your disposal, clearing rooms will never be easier!
Buy every class, every spell, every upgrade, and max them all out. Once you do, nothing will be able to stand in your way!
Collect a boatload of gold.
Defeat the southern half of the island to fill the Old Codger's shoes.
Reunite the Conductrex by defeating all the evils of the island, and win the game!
Reach untold levels of power.
Reach even higher levels of power.
Find the secret room in The Abyss to see some BlitzKeep prototype artwork!
Visit 100 rooms in The Abyss on a single run.
Visit every part of the island.
Clear a room of all enemies to get a nice gold reward.
Become the Grim Reaper itself and clear an entire level of all enemies.
Win a level without ever stepping on a stop waypoint (doors are okay).
Win a level where you have run out of time in *every* room (except the boss room).
Win a level after Puddland without ever picking up any item – no weapons, shields, potions, spells, or gold.
Win a level (after Puddland) without more than 5 seconds passing on the clock of any room (not including the boss room).