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