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