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