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.
Escape from the simulation.
Destroy the simulation
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 the Panda's diorama in Axis Mundi.
Find Bliss in Axis Mundi.
Visit 15 different locations in Axis Mundi.
Find Morty the robot in Axis Mundi.
Find the Harvest Time rift.
Unlock all codebreaker modes.
Do 5 quests for the Clan Masters in Knight's Code.
Collect 10 iron.
Create 5 items in the Forge in Knight's Code.
Break out of the prison.
Collect 3 memories of Ken.
Get to the Umbra's House.
Use the cat go through the gate.
Gather 3 Poteto Gomuins in Knight's Code.
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.
Search all the trash bins in Fallen Hero.
Explore all death hypotheses in Fallen Hero.
Meet the diginet in the street.
Get the maximum profession tier in at least two paths in one playthrough.
Make Ken a pretty straightforward proposal.
Obtain the maximum profession tier.
Win a gun duel with the sheriff.
Help the Bandit escape in Harvest Time.
Use your deduction at least 15 times.
Listen to the 3 tales from the Rusty Ed.
Find two ways to reach the graveyard.
Get 5000 Harvest Time's coins.
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.
Get 50 information for deduction.
Help Fredo in Like Father Like Son.
Complete all the fetchquests from Troll King.
Surprise Jester in the theater.
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.
Scratch Haggis' golden frame.
Complete the solitaire in Haggis' office.