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