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