Find the following outfit pieces by searching the corresponding locations. Note: All outfits have the same function as in Dead Rising 2. The Protoman outfit is a throwback to the original Dead Rising, except you have a shield as well as a cannon.
SOLDIER OUTFIT PIECE
In a box in the vacant store to the right of the Ultimate Playhouse at South Plaza.
Earn the "Save the Girl...Again" achievement or trophy.
In Shank's in the Palisades Mall.
Purchased in the Platinum Strip Pawnshop.
PSYCHOPATH OUTFIT PIECE
In the security room in Fortune City Arena.
Defeat Carl in mail order Zombrex mission.
Watch the Timeshare movie in Paradise Platinum Screens in the Platinum Strip, from 12 a.m. to 2 a.m.
In the Wedding Chapel on the Silver Strip.
NINJA OUTFIT PIECE
In the Man's Sport store in the Uranus Zone.
Earn the "Elite Killer" achievement or trophy.
In a hidden room along the Ninja path in the Royal Flush
On the mannequin by the entrance to Shoal Nightclub.
SPORTS FAN OUTFIT PIECE
In SporTrance in the Royal Flush Plaza.
In KokoNutz Sports Town in Palisades Mall.
At the end of the Ninja path in the Americana Casino.
In the back room of Hot Excitorama on the Silver Strip.
PROTO MAN OUTFIT PIECE
Earn the "Challenge Experience" achievement or trophy.
In the Ultimate Playhouse in the Palisades Mall.
Earn the "Save the Girl Yet Again" achievement or trophy.
Defeat Jack at strip poker in the Ante Up mission, or defeat him in Sandbox mode.
To make an easy $40,000, head to Slot Ranch Casino in Sandbox mode and kill enough zombies to unlock the challenge on the stage. Before starting the challenge, go behind the curtain and find the flying saucer. Bring it with you and start the challenge. When the challenge begins, start the flying saucer. The zombies will be lured into the saucer. When 25 zombies get close enough and remain there, you will win $40,000. After the challenge, pick up the saucer and repeat the process as many times as desired.
Royal Flush Plaza, Tunemaker's maintenance room (Bargaining 2).
Fortune Park, entrance to Uranus Zone, under right escape pod ($10,000).
Royal Flush Plaza, on the second floor, jump on the phone booth and follow the secret route. Go the other way before jumping on the platform with the flowers then jump to another platform with the key ($50,000).
Fortune Park, ledge to right of entrance to hotel (Gambling 3).
Royal Flush Plaza, Sturdy Package, behind counter ($50,000).
South Plaza, Hotel Lobby (Zombrex and gems).
Silver Strip, Hot Exictorama ($50,000 and massager).
Uranus Zone, The Venus Touch (six shooter).
Atlantica Casino, in front of Poseidon Statue ($25,000 and Zombrex).
Places I found Zombrex:
-On top of safe house roof
-Carl(mailman) boss fight
-Uranus Vault with security box key
-Uranus VIP lounge in ledge
-1 more on ledge in Uranus park area
-all original spots from dr2 except undergrou