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