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