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
Escape from the simulation.
Destroy the simulation
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.
Visit 15 different locations in Axis Mundi.
Find Bliss in Axis Mundi.
Find Morty the robot in Axis Mundi.
Find the Harvest Time rift.
Unlock all codebreaker modes.
Break out of the prison.
Do 5 quests for the Clan Masters in Knight's Code.
Collect 3 memories of Ken.
Get to the Umbra's House.
Create 5 items in the Forge in Knight's Code.
Collect 10 iron.
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 Trolls respect in the bar.
Gain Sleeves respect in the bar.
Order a whiskey at Yet's bar.
Get the maximum profession tier in at least two paths in one playthrough.
Explore all death hypotheses in Fallen Hero.
Search all the trash bins in Fallen Hero.
Meet the diginet in the street.
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.
Get 50 information for deduction.
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.
Find all the clues written on the boards.
Help Fredo in Like Father Like Son.
Surprise Jester in the theater.
Complete all the fetchquests from Troll King.
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.