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