Here is the full list of all 36 The Flame in the Flood achievements.
Survive 200 miles in Endless Mode
Survive 100 miles in Endless Mode
Make 50 articles of clothing
Complete the campaign without killing any animals
Travel 10 miles on the river without stopping
Travel 20 miles with the raft motor running
Survive 40 days in Endless Mode without sleeping in a shelter
Survive the first 40 days in Endless Mode without eating any plants
Survive the first 20 days in Endless Mode without killing any animals
Die in every possible way
Repair 1000 points of raft health
Contract Every Affliction
Speak with every river resident
Die from dehydration with suffering from dysentery
Reach The Kingdom in Campaign Mode
Sleep in 20 churches
Equip a full set of Bear Hide clothing
Craft every item
Eat all the bad stuff in a single playthrough (tainted bait, spoiled fish, raw meat, spoiled meat, devil's trumpet)
Reach Angel Yards in Campaign Mode
Killl a Bear
Kill every animal type with arrows
Poison 20 wolves with tainted meat
After 20 days of travel, have every stat at 100% and no afflictions
Visit every location type
Reach High Ground in the Campaign Mode
Equip a full set of Wolf Hide clothing
Eat every type of plant
Cure 30 afflictions in a single playthrough
Lure a hostile animal into a snake
Fully upgrade your raft in a single playthrough
Kill a wolf
Expand your inventory to the maximum
Have 10 stacked afflictions
Build a campfire
Start a new game with items in Aesop's bag