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.
Be victorious any time.
Ask the priest for a duel.
Stay at peace.
Be victorious.
Be victorious for a second time.
Opened the Naropolus' door
Finished the game
Repaired and scavenged the robots.
Solved the RGB puzzle.
Talk to the Chief.
Talk to the Pentatonical Priest
Escape through the Bar shelf.
Talk to the Dinosaur Head.
Open the door of your house with a key
Wait for an elevator for a while
Get the Game Over screen
Intimidate your PC with a hammer
Tune the piano
Ask the Fugu for advice 5 times in the same location
Solve the random numbers puzzle
Talk to the Kiryat priest
Talk to Sergio
Solve the Cube puzzle
Finish the report