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