Here is the full list of all 26 Dread Hunger achievements.
Skipper the ship for 10 nautical miles
Win every map as every character
As an Explorer, survive an entire match without eating any meat
As an Explorer, win a game without hitting an iceberg
Get an S rating with every character
As an Explorer, win while 100% cannibal
As a Thrall, use the nitro to explode 3 Explorers at once
As an Explorer, win a game
Poison the ingredients of the crew's stew
Win 20 games of poker
As a Thrall, win by sinking the ship
Kill a polar bear with your bare fists
Cook a stew
Max the boiler fuel gauge
Build a totem
Build a totem on the ship
As a Thrall, claim a musket
As a Thrall, win without either Thrall causing direct damage to another player
Invite a friend aboard
As a Thrall, win by sailing the wrong way
Win a game without your heat or hunger ever fully depleting
Craft a satchel
Put coal in the boiler
Destroy all the totems in the tutorial
Complete the tutorial