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.
Destroy the simulation
Escape from the simulation.
Help Rhonda find her son.
Gather a team of at least 3 people.
Agree with the simulation owners
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 Morty the robot in Axis Mundi.
Find the Harvest Time rift.
Break out of the prison.
Collect 10 iron.
Get to the Umbra's House.
Get the maximum profession tier in at least two paths in one playthrough.
Gather 3 Poteto Gomuins in Knight's Code.
Collect 3 memories of Ken.
Use the cat go through the gate.
Create Ken's V-Ghost from his psychoscan.
Gain Trolls respect in the bar.
Use the brainfix on yourself.
Gain Sleeves respect in the bar.
Order a whiskey at Yet's bar.
Explore all death hypotheses in Fallen Hero.
Search all the trash bins in Fallen Hero.
Obtain the maximum profession tier.
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.
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.
Get 50 information for deduction.
Find all the clues written on the boards.
Help Fredo in Like Father Like Son.
Get 20 aspects.
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.
Help the Bandit escape in Harvest Time.
Meet the diginet in the street.
Do 5 quests for the Clan Masters in Knight's Code.
Create 5 items in the Forge in Knight's Code.
Find the Panda's diorama in Axis Mundi.
Find Bliss in Axis Mundi.