Here is the full list of all 45 Children of Morta achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Use 5 charms in the same dungeon run.
Find 10 secrets.
Bring back 15 souvenirs from the dungeons.
Find 20 journals.
Construct Ben's wine machine.
Kill 250 ferocious enemies.
Resolve 20 puzzle events.
Complete 10 challenge rooms.
Complete 10 in-run events.
Free the runemender.
Finish a dungeon in co-op mode.
Revive 5 times in co-op mode.
Upgrade 75 times in the workshop.
Shelter the stargazer.
Kill 100 enemies using hazards.
Reunite the automata.
Have 3 runes equipped simultaneously.
Upgrade The Book of Rea 15 times.
Have 20000 Morv.
Find 10 divine items in a single dungeon.
Unlock all family traits.
Defeat OU.
Upgrade 25 times in the workshop.
Free Anai-Sarava.
Free the blackmarketeer.
Bring Hope into the world.
Free Anai-Raha.
Kill a boss with every playable character.
Rescue Mary.
Unlock all family traits of a Bergson.
Kill a boss without receiving damage.
Unlock all playable characters.
Complete 5 in-run events.
Free Anai-Dya.
Upgrade The Book of Rea 5 times.
Kill 5000 enemies.
Kill 50 ferocious enemies.
Unlock a family trait of three different Bergsons.
Save the wolf cub.
Upgrade 10 times in the workshop.
Gain each obelisk effect at least once.
Defeat the Spider King.
Unlock a family trait.
Free the shopkeeper.
Investigate the shrine of Rea.