Here is the full list of all 24 Dawn of Man achievements.
Launch the game
Complete tutorial
Have at least 3 mines at one given time in the Neolithic era
Hunt 100 deer in one game
Hunt a Mammoth
Get to the Iron Age
Produce 10 Steel Swords in one game
Complete 5 milestones in hardcore mode
Complete all milestones
Complete all milestones in hardcore mode
Get 200 people in your settlement
Get 100 people in your settlement in the Paleolithic era
Research all techs in the tech tree in less than 5 hours of gameplay
Unlock the Bronze Age in the Ancient Warriors scenario
Unlock the Steelmaking tech in the Ancient Warriors scenario
Achieve a population of 50 in the Continental Dawn scenario
Achieve a population of 50 in The Northlands scenario
Achieve a population of 50 in the Ancient Warriors scenario
Build a Menhir, Dolmen, Stone Circle, Statue and Cairn in the same game
Reach 1000 prestige
Reach 900 prestige in the Stone Age
Complete 1 challenge
Complete all 4 challenges
Complete all 4 challenges in hardcore mode