Here is the full list of all 15 Signs of Life achievements.
Cook and eat human flesh.
Discover the fate of the Hermes Captain.
Drink an explosion potion. For some reason.
Get brown on you.
Craft a refined gem.
Craft a rough gem.
Find a jug of piss. For some reason.
Wreck the Buff Mechington.
Defeat the Buff Mechington with a kick to the butt.
Make a lewd gesture with the Magnetic Inductor while in a bed.
Soil a chicken with dung.
Kill a chicken with an egg.
Craft a faceted gem.
Craft a brilliant gem.