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