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