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