Here is the full list of all 41 The Serpent Rogue achievements.
Find the Fighting Pit
Complete a Fallen Warrior Quest
Destroy 10 Soul Vessels
Light up an extinguished Torch
Gather 10 Followers in the Camp location
Discover the Gorgon's Location
Buy 5 Items From the Merchant House
Tame a Valravn
"Receive 100 total damage from enemies "
Brew 30 Unique Potions
Brew 15 Unique Potions
Brew 10 Sloppy Potions
Discover the location of the Undertaker
Remove Corruption from 12 Creatures
Collect 500 Gold Coins
Craft a Sanctum Vessel
Spend 500 Food to speed up time while sleeping
Discover a Dobhar Chu
Remove Poison from yourself or your followers 10 times
Using water, extinguish fire from yourself 3 times
Create 5 Creatures
Cook 20 different dishes
Bind 10 Creatures from the Mavka
Open 25 Locks using a Picklock
Catch 25 Fish in Water Banks
Discover 15 Creatures in the Journal
Open 3 Moonstone Chests
Block incoming damage with a Broom 50 times
Enhance 10 Weapons in the Smeltery
Find 25 Worms in Stumps
Play with 5 different Creatures
Disperse 3 Ghouls using the Undertaker
Steal 8 Items from Creatures
Apply the "Stinky" status effect to yourself or an NPC 3 times
Lay 5 Eggs
Bind 15 people from the Harbormaster
Resurrect 5 followers with the Undertaker
Shoot down 5 flying Chickens
Research all Ingredients in your Journal
Catch 15 Butterflies
Eat raw food 5 times