GAC Helmet
Difficulty=EASY
Unlock: Get 30 headshots in any level on OFFICER difficulty or higher

GAC Armor
Difficulty=AVERAGE
Unlock: Complete the game on OFFICER difficulty

Logo T-Shirt
Difficulty=AVERAGE
Unlock: Complete the Protect the Innocent Achievement

GCPD T-Shirt
Difficulty=AVERAGE
Unlock: Complete any level (excluding the Prologue) without firing a shot

Jack and Shadow T-shirt
Difficulty=AVERAGE
Unlock: Combine Jack and Shadow to kill 20 enemies in any level on OFFICER or greater difficulty

Planeswalker T-Shirt
Difficulty=???
Unlock: Unlock all off the Cards in 3 Decks

Magic the Gathering Deckl
Difficulty=AVERAGE
Unlock: Unlock all the Cards in 6 Decks

After Burner T-Shirt
Difficulty=AVERAGE
Unlock: Unlock all EX Options

After Burner Headgear
Difficulty=AVERAGE
Unlock: Complete your Medal Collection

Cartman's Hat
Difficulty=Easy
Unlock: Complete a full level

Kenny's Coat
Difficulty=AVERAGE
Unlock: Complete the Game