Here is the full list of all 34 Healer's Quest achievements.
Upgrade all rings
Complete the inventory
Complete the team challenge
Save Murky
Save Beauty
Save Grumpy
Complete every character's challenge
Save Tanky
Defeat Don Chitor and get your loot back
Beat the Evil King Simon
Troll the Trolls
Beat the Diabolic Lovers of Ancestral Castle
Unlock all secret spells
Beat Kronaxx, the necromancer
Customize your own crypt
Complete a daily Quest in the Crypt
Unlock a secret upgrade
Try to talk to wolves
Unlock a secret Spell
Put Magical Forest on fire
Upgrade a spell to level 7
Meet Uncle Troll
Get racketted by your teammates
Beat the Royal Instructor
Escape from the prison
Defeat the priest and his abomination
Upgrade a ring
Beat the Boss-In-A-Box in Tribal Cave
Unlock all spells
Make one of your allies sulk
Kill the dragon in Classical Dungeon
Pass a night outside
Rescue a girl in distress
Discover what's inside the chest near Tutorial Town