Full list of all 25 Dark Grim Mariupolis achievements worth 4,000 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements in the base game.
The base game contains 10 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 15 achievements worth 3,000 Gamerscore.
Finished the prologue.
Solved the RGB puzzle.
Repaired and scavenged the robots.
Opened the Naropolus' door
Finished the game
Be victorious.
Be victorious for a second time.
Stay at peace.
Ask the priest for a duel.
Be victorious any time.
Talk to the Dinosaur Head.
Talk to the Chief.
Escape through the Bar shelf.
Open the door of your house with a key
Talk to the Pentatonical Priest
Ask the Fugu for advice 5 times in the same location
Tune the piano
Get the Game Over screen
Intimidate your PC with a hammer
Wait for an elevator for a while
Finish the report
Solve the random numbers puzzle
Talk to Sergio
Talk to the Kiryat priest
Solve the Cube puzzle