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