Deadly Premonition [Xbox 360]

Special weapons
Complete the indicated task to unlock the corresponding special weapon, which have unlimited ammunition and do not degrade.
.357 Magnum: Complete Sidequest #11, "Snack For Willie", with all seven bones in your inventory. Then, find Forrest and Willie. Willie will take the bones. Find Forrest's truck and take the bones back.
10mm submachine gun: Complete Sidequest #14, "Map To Psychic Spot A".
12Ga shotgun CQB: Complete Sidequest #15, "Map To Psychic Spot B".
Axe: Re-enter the Sheriff Department Other World.
Chainsaw: Re-enter the Harry's Mansion Other World.
Grass Cutter: Re-enter the Community Center Other World.
Light Sword: Complete Sidequest #39, "Top Collector".
RPG: Complete Sidequest #16, "Map To Psychic Spot C".
Wesley Special: Complete Sidequest #50, "Ghost House Treasure".
Wrench: Complete Sidequest #29, "Engagement Ring".

Free items
Go downstairs at the Greenvale Sheriff's Office to the shooting range. Shoot a target until the "Item Acquired!" message appears. Turn around and collect the item. Note: Each target has a different item. This can be done as many times as desired.

Achievements
Complete the following achievements to unlock Xbox Live Gamerscore points. Note: All twelve achievements are secret.
Collected all trading cards! (150 points): Recovered all the trading cards.
Episode 1 Cleared! (50 points): Completed Episode 1
Episode 2 (part 1 points) cleared! (50 points): Completed episode 2 (part 1).
Episode 2 (part 2 points) cleared! (50 points): Completed episode 2 (part 2).
Episode 3 cleared! (50 points): Completed episode 3.
Episode 4 cleared! (50 points): Completed episode 4.
Episode 5 cleared! (50 points): Completed episode 5.
Episode 6 cleared! (50 points): Completed episode 6.
Game completed on Easy! (100 points): Completed all episodes on easy difficulty.
Game completed on Hard! (200 points): Completed all episodes on hard difficulty.
Game completed on Normal! (150 points): Completed all episodes on normal difficulty.
Prologue cleared! (50 points): Prologue completed.