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