The Dark Magic Add-on for Castle Explorer has 31 achievements.
Wake the undead
Meet the angel of light
Find a dragon corpse
Find the mystic magic gem
Find an escape door in the dark below
Meet the worm rear
Find the gate key
Find the magic ring
Find a sack
Find the skeleton key
Find the legendary armour
Find and equip boots
Use the dead helmet
Find the rare lucky ring
Find the mighty magic sword
Be saved by orb of hope
Get a curse bite
Get eaten by a door
Use a portal
Meet a banshee
Gamble with the gambler
Defeat the snake and loot from the gold cave
Gaze at an ooze egg
Go in panic
Die by the shadows
Buy an item from the trader
Find the lost wizard amulet
Become a piggy
Fall into the below
Get surprised by a volatile ooze
Escape from the castle with Valtiel (Gamemode key enabled)