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