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