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.
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.
Find Bliss in Axis Mundi.
Visit 15 different locations in Axis Mundi.
Find the Panda's diorama in Axis Mundi.
Find Morty the robot in Axis Mundi.
Find the Harvest Time rift.
Unlock all codebreaker modes.
Break out of the prison.
Get the maximum profession tier in at least two paths in one playthrough.
Create 5 items in the Forge in Knight's Code.
Get to the Umbra's House.
Collect 10 iron.
Gather 3 Poteto Gomuins in Knight's Code.
Use the brainfix on yourself.
Gain Sleeves respect in the bar.
Order a whiskey at Yet's bar.
Use the cat go through the gate.
Create Ken's V-Ghost from his psychoscan.
Search all the trash bins in Fallen Hero.
Explore all death hypotheses in Fallen Hero.
Win a gun duel with the sheriff.
Make Ken a pretty straightforward proposal.
Use your deduction at least 15 times.
Scratch Haggis' golden frame.
Get 5000 Harvest Time's coins.
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.
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.
Obtain the maximum profession tier.
Get 20 aspects.
Get 50 pieces of information for the codex.
Complete the solitaire in Haggis' office.
Help Starlett get out of limbo.
Help Ramon to force another player out from Twisted & Perverted.
Complete all the fetchquests from Troll King.
Surprise Jester in the theater.
Help the Bandit escape in Harvest Time.
Meet the diginet in the street.
Gain Trolls respect in the bar.
Do 5 quests for the Clan Masters in Knight's Code.
Collect 3 memories of Ken.
Help Rhonda find her son.
Destroy the simulation
Escape from the simulation.