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