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