Here is the full list of all 53 Gamedec achievements.
The base game contains 52 achievements, and there is 1 DLC pack containing 1 achievements.
Destroy the simulation
Help Rhonda find her son.
Escape from the simulation.
Collect 3 memories of Ken.
Do 5 quests for the Clan Masters in Knight's Code.
Create 5 items in the Forge in Knight's Code.
Use the brainfix on yourself.
Gain Sleeves respect in the bar.
Gain Trolls respect in the bar.
Order a whiskey at Yet's bar.
Help the Bandit escape in Harvest Time.
Agree with the simulation owners
Gather a team of at least 3 people.
Lock 3 characters in the loop in Paradise Beach.
Get to the Paradise Beach.
Visit 15 different locations in Axis Mundi.
Find the Harvest Time rift.
Find Morty the robot in Axis Mundi.
Find Bliss in Axis Mundi.
Unlock all codebreaker modes.
Find the Panda's diorama in Axis Mundi.
Break out of the prison.
Gather 3 Poteto Gomuins in Knight's Code.
Get the maximum profession tier in at least two paths in one playthrough.
Get to the Umbra's House.
Collect 10 iron.
Use the cat go through the gate.
Obtain the maximum profession tier.
Create Ken's V-Ghost from his psychoscan.
Use your deduction at least 15 times.
Explore all death hypotheses in Fallen Hero.
Search all the trash bins in Fallen Hero.
Get 50 information for deduction.
Meet the diginet in the street.
Make Ken a pretty straightforward proposal.
Win a gun duel with the sheriff.
Listen to the 3 tales from the Rusty Ed.
Get 5000 Harvest Time's coins.
Find two ways to reach the graveyard.
Get a gun in Harvest Time.
Fully expand your farm in Harvest Time.
Reach the Farm Level 5 in Harvest Time.
Find all the clues written on the boards.
Help Fredo in Like Father Like Son.
Surprise Jester in the theater.
Complete all the fetchquests from Troll King.
Help Ramon to force another player out from Twisted & Perverted.
Get 20 aspects.
Get 50 pieces of information for the codex.
Help Starlett get out of limbo.
Complete the solitaire in Haggis' office.
Scratch Haggis' golden frame.