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