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