Here is the full list of all 25 The Enchanted Cave 2 achievements.
Transmute an item
Save one person
Equip an artifact in every equipment slot
Completely fill all sections of the museum
Defeat the final boss
Completely fill one equipment section of the museum
Complete the combat section of the skill tree
Defeat the sorcerer
Complete the magic section of the skill tree
Complete the crafting section of the skill tree
Reach character level 25
Defeat the Yeti
Craft 75 total potions
Discover 10 secret areas
Successfully escape the cave with an artifact
Craft 15 total potions
Completely clear one floor of all enemies and loot
Complete the Monster's Lair Challenge
Complete the Labyrinth Challenge
Complete Green Goo's Quest
Save two people
Save three people
Complete the main game in a single run
Complete a New Game +