Here is the full list of all 30 Eventide 2: The Sorcerers Mirror achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Play the game again and make different choices
Find all the glimmering mirrors
Free Jenny
Face consequences of your decisions
Defeat Tvardovsky
Finish all Minigames without skipping
Talk with all Imps in the game
Complete all Hidden Object Puzzles without using Hints
Read all the notes placed in the game
Find all the cards with Imps
Finish any Hidden Object Puzzle in less than half a minute
Find proof for Yanosik
Help the Imp to assemble the necklace
Get into Tvardovsky's house
Make elixir for Yanosik
Find half of all glimmering mirrors
Find half of the cards with Imps
Get away from the prison cell
Watch all the cutscenes from the first hour of the game
Put the Wolf to sleep
Finish three Minigames in a row without skipping
Complete three Hidden Object Puzzles with no more than 5 mistakes in each one
Make first moral choice in the game
Heal wounded Yagna
Find 3 Hidden Objects in 3 seconds
Find first glimmering mirror
Get into Tvardovsky's domain
Finish a Minigame in less than 1 minute
Find the first card with Imp
Complete any Hidden Object Puzzle without using Hints