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