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