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