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