Dead Rising 2

This is a list the locations of the Zombrex posters that I found when I was working on this achievement. It took me approximately 2 hours to find all the posters.

I've grouped the posters according to their location. This list includes all 34 Zombrex locations, although only 33 are required to get this achievement.

Royal Flush Plaza
First Floor
On the west wall just outside Casual Girls (R101)
On the standing advertisement between the Newsstand (R114) and The Dark Bean (R120)
Inside Roy's Mart by the left set of doors. (You can get this while doing the first Zombrex mission for Katey)

Second Floor
On the standing advertisement at the top of the stairs SE of Rush Wireless (R211)

Slot Ranch Casino
On the wall just outside the women’s restroom
On the wall by the single ATM at the by the tunnel to the food court (across from the big slot machine)

Food Court
On the wall between Speedy Espresso (F108) and Hungry Joe’s (F107)
To the right of the three snack machines near the door leading to the Yucatan Casino
To the right of the maintenance room doors (almost inside the bakery)

Americana Casino
On the wall in the last booth before the stairs on the first floor of the BBQ joint (A101)
On the wall between the bathroom entrances
On the S wall of the first section of the cashier’s office (not available until mission 3-2)

South Plaza
On the N wall just past the second under construction store in the first “ring” west of the hotel
On a wall in the SE corner of the second “ring” west of the hotel on the second level of scaffolding
On a wall under the last section of scaffolding in the third “ring” west of the hotel on the west wall as you approach the arena

Fortune City Arena
On the N wall behind the counter of Hostile Zone (E102)
On the wall to the right of the snack machine by the maintenance room (not available until mission 1-3)

Platinum Strip
On the wall in the southern corner of near the arena entrance at the top of the steps
On the wall immediately right of the maintenance room next door to the pawn shop
On the wall to the right of the entrance of the Emergency Shelter (down a flight of stairs stuffed with zombies)

Atlantica Casino
On a wall in the SW security office in the back room
On the S wall next to the snack machine next to the Palisades Mall exit
On the western part of the back wall in the poker room

Palisades Mall
First Floor
On the back of the S escalator block by the Atlantica Casino exit
On the wall in the back room of Venus Touch (P109) directly across from the door

Second Floor
On the wall to the left of the entrance to the men’s restroom
On the wall between Under the Sea Travelers (P207) and the Pawn store (P208)

Fortune Park
On the wall behind the Ramsterball (to the left when facing the ball from the center of the park)
On the standing advertisement in the south of the park between the hotel and Atlantica Casino

Silver Strip
On the standing advertisement just outside the doors to Slot Ranch Casino
On a wall in the alley behind the adult toy store (N110)
On a wall by the maintenance room SE of Luaii Wauwii (N105) on the corner of the building

Yucatan Casino
On the wall in the eastern most corner on the lower level by the doors exiting to the Silver Strip
On the wall in the very back of the women’s restroom

One final note, you won't be able to finish this achievement until mission 1-3 at the earliest as two of the Zombrex posters are locked behind areas that don't unlock until mission 1-3 and 3-2 respectively.

Should anyone have suggestions as to a method to better describe these locations or any other way this guide could be improved please level a comment or message me. Thanks for looking and good luck.