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