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