Full list of all 36 The Flame in the Flood achievements worth 1,000 gamerscore. It takes around 60-80 hours to unlock all of the achievements on Xbox One.
You survived 40 days in Endless Mode without eating any meat
Completed the campaign without killing any animals
You survived 200 miles in Endless Mode.
You survived 100 miles in Endless Mode
You travelled 20 miles with the raft motor running
You fully upgraded your raft in a single playthrough
You survived 40 days in Endless Mode without eating any plants
Equipped a full seat of Bear Hide clothing
You killed every type of animal with arrows.
You survived 40 days in Endless Mode without sleeping in a shelter
You ate all the bad stuff in a single playthrough.
You have contracted every affliction.
You died in every possible way.
Dehydration AND dysentery? Are you from Oregon?
Made 50 articles of clothing
You repaired 1000 points of raft health
You crafted every item.
You spoke with every river resident
You travelled 10 miles on the river without stopping.
You reached The Kingdom in Campaign Mode
You poisoned 20 wolves with tainted meat
You slept in over 20 churches.
Take that... bear.
You reached Angel Yards in Campaign Mode
You equipped a full set of Wolf Hide clothing
You cured 30 afflictions in a single playthrough
You reached High Ground in the Campaign Mode
After 20 days of travel, you had every stat at 100% and no afflictions
You expanded your inventory to the maximum
You ate every type of plant
You visited every location type
You lured a hostile animal into a snake
You are the killer of wolves.
You started a new game with items in Aesop's bag
You stacked 10 afflictions
You built a campfire