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