Here is the full list of all 31 Going Medieval achievements.
Unlock 25x Research Items
Dismantle 50x items
Hunt 20x Deer
Dismantle 5x Items
Hunt 20x Wolves
Hunt 5x Wolves
Gather 10x Settlers
Survive a Full Year
Hunt 20x Hares
Unlock 10x Research Items
Survive Until the First Winter
Hunt 5x Deer
Survive Until the First Autumn
Unlock 5x Research Items
Store 20,000 Nutrition
Store 10,000 Nutrition
Hunt 5x Hares
Survive Until the First Summer
Unlock 3x Research Items
Harvest 200 Crops
Survive for Seven Days
Survive the First Raid
Kill a Raider
Store 5000 Nutrition
Build a Wooden Beam
Harvest 50 Crops
Unlock First Research Item
Build an Enclosed Room
Harvest 5 Crops
Produce a Meal at a Campfire
Survive the First Day