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