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