Here is the full list of all 52 Dawn of the Mexica achievements.
Get beyond the first level
Kill 10 creatures in a single run
Kill 100 creatures in a single run
Kill 1000 creatures in a single run
Eat teotlacuilnanacatl mushrooms
Drink meoctli (fermented maguey plant)
Drink from the Apanohuaia river
Eat night shards fallen from the sky
Eat some delicious fried chapolines
Enter the lost tolteca city
Enter Cincalco caves
Enter the temple where Ehecatl reigns
Reach the last level of Mictlan
Arrive at the city of Tenochtitlan
Kill the God of Cold and Snow
Kill Tzinakantli, the Quick Shadow
Kill Nemalhuili, the Gray Sorceress
Kill Citlalmina, the Fiery Tzitzimime
Kill Kuauchilli, the Red Suffocation
Kill Tepeyollotl, the Jaguar God
Kill Motecuhzoma Xocoyotzin
Kill Pedro de Alvarado, the Bloodthirsty
Kill Huehue Xicohtencatl, the tlaxcalteca leader
Kill the ghost of Huemac, the last king of the Toltec
Kill Hernán Cortés, the Conquistador
Kill Xochitonal, Guardian of the Apanohuaia
Transform into a tecolotl
Pet a Mirror Xoloizcuintle
Reach the Apanohuaia with your loyal dog
Truly please Mictecacihuatl, Queen of Mictlan
Irritate Mictecacihuatl, Queen of Mictlan
Make a Chilobo afraid
Avoided the effects of a christian 'Iron Nails' spell
Avoided the effects of a christian 'Crown of Thorns' spell
It shouldn't be too hard, really
Find out how to create healing liquid
Sacrifice a person on an altar
Flay a person on Xipe Totec’s altar
Cross the Apanohuaia river in Mictlan
Cast the highest level Fire Mastery spell
Cast the highest level Light Mastery spell
Cast the highest level Earth Mastery spell
Cast the highest level Ice Mastery spell
Cast the highest level Healing Mastery spell
Cast the highest level Blessings spell
Cast the highest level Weather Mastery spell
Cast the highest level Shape Mastery spell
Life itself is, though
Stop the Apocalypse
Make the final sacrifice upon the appropriate stone
Reach the dreamworld
Have a taste of amniotic liquid