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