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