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