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