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.
Find the Panda's diorama in Axis Mundi.
Find Morty the robot in Axis Mundi.
Find Bliss in Axis Mundi.
Collect 3 memories of Ken.
Do 5 quests for the Clan Masters in Knight's Code.
Use the cat go through the gate.
Use the brainfix on yourself.
Gain Sleeves respect in the bar.
Meet the diginet in the street.
Make Ken a pretty straightforward proposal.
Help the Bandit escape in Harvest Time.
Find two ways to reach the graveyard.
Find all the clues written on the boards.
Surprise Jester in the theater.
Complete all the fetchquests from Troll King.
Help Ramon to force another player out from Twisted & Perverted.
Help Starlett get out of limbo.
Scratch Haggis' golden frame.
Complete the solitaire in Haggis' office.
Agree with the simulation owners
Lock 3 characters in the loop in Paradise Beach.
Get to the Paradise Beach.
Visit 15 different locations in Axis Mundi.
Unlock all codebreaker modes.
Find the Harvest Time rift.
Break out of the prison.
Create 5 items in the Forge in Knight's Code.
Get to the Umbra's House.
Collect 10 iron.
Gather 3 Poteto Gomuins in Knight's Code.
Get the maximum profession tier in at least two paths in one playthrough.
Create Ken's V-Ghost from his psychoscan.
Obtain the maximum profession tier.
Gain Trolls 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.
Get 5000 Harvest Time's coins.
Win a gun duel with the sheriff.
Get a gun in Harvest Time.
Use your deduction at least 15 times.
Get 50 information for deduction.
Listen to the 3 tales from the Rusty Ed.
Fully expand your farm in Harvest Time.
Reach the Farm Level 5 in Harvest Time.
Help Fredo in Like Father Like Son.
Get 50 pieces of information for the codex.
Get 20 aspects.