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