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