Here is the full list of all 12 Deadly Premonition (EU/JP) achievements worth 1,000 gamerscore.
Completed all episodes on easy difficulty.
Completed all episodes on hard difficutly.
Recovered all the trading cards.
Completed all episodes on normal difficulty.
Completed episode 6.
Completed episode 5.
Completed episode 4.
Completed episode 3.
Completed episode 2 (part 2).
Completed episode 2 (part 1).
Completed episode 1.
Prologue completed.