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