Dead Rising 2 - Platform: XBox 360

Bonus costumes:
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Successfully complete the indicated task to unlock the corresponding
costume in the safehouse closet:

Bowling Shirt: Start a game by importing a Dead Rising: Case Zero file.
Champion's Jacket: Win a TIR episode.
Convicts: Kill ten psychopaths.
Dealer Outfit: Change into all available pieces of clothing,
except locker items.
Hockey Mask: Use all melee weapons on zombies.
Hunting Jacket: Start a game by importing a Dead Rising: Case Zero file.
Overalls: Start a game by importing a Dead Rising: Case Zero file.
Tattered Clothes (Shaun Of The Dead outfit): Kill 1,000 zombies
using hand-to-hand combat.
TIR Helmet: Earn $1,000,000 in TIR Online.
TIR Outfit: Earn $5,000,000 in TIR Online.
Waitress Outfit: Start a game by importing a Dead Rising: Case Zero file.
Willemette Mall: Rescue 50 survivors. 


Ghosts 'n Goblins knight armor:
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Collect all four pieces of the knight armor to reduce damage taken to
half. However, if you lose 50% health, the armor will break and you will
take normal damage in your underwear. The armor pieces can be collected
as follows:

Beard: In the rear of the "Wave Of Style" hairdresser's shop in
Royal Flush Plaza.
Knight's Armor: Successfully complete the game with an "S" rank.
Knight's Boots: Purchase for $2 million from "Moe's Migitations"
on the Platinum Strip.
Knight's Helmet: Rescue Jack in the "Meet The Family" mission, and
defeat him in a game of poker <#> in the "Ante Up" case. 


Alternate endings:
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Successfully complete the indicated task to unlock the corresponding
ending sequence:

Ending A: Successfully complete all cases, give Katey the Zombrex
each time, and do not give TK the Zombrex before completing "The
Facts".

Ending B: Give Katey the Zombrex each time, but starting at Case
6-2, allow the time to advance until 7 a.m. on September 29, and
do not complete "The Facts".

Ending C: Give Katey the Zombrex each time, but do not complete
Case 6-1 or fail any other case before Case 6-1, and be in the
safehouse before the military arrives.

Ending D: Be outside the safehouse when the military arrives.

Ending F: Do not give Katey the Zombrex, and be in the safehouse
when the military arrives.

Ending S: Successfully complete all cases, give Katey the Zombrex
each time, and give TK the Zombrex before completing "The Facts". 


Easy leveling:
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Enter Fortune Park, and go towards the Atlantica Casino, but do not go
in. Instead, follow the wall right until you see a maintenance door.
There should be a stick of dynamite and a hunk of meat right outside the
door. Pick both of these up, then enter the maintenance room, and
combine them to get the Dynameat. Next, go to the fireworks stand, grab
some firecrackers, and jump up on top of the stand. Lure a large amount
of zombies near you using the firecrackers. Once there is a large group
of zombies, jump into the middle of the crowd, use the Dynameat, and
then get out quickly. Once it explodes, you will get a lot of PP. Once
you enter a nearby place, all the items will respawn. Repeat this as
many times as desired. *Note:* This trick is still very effective at
levels 45 and higher.


Easy money:
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Collect all three gambling magazines. Then, go to Slot Ranch Casino, and
play the large heart-shaped single pink slot machine on the first floor
near the access point to the Food Court. Keep betting the max of $1,000
to win a lot of money quickly. It is possible to win approximately
$1,000,000 every ten minutes. 
Note: Sometimes you may not win anything for three minutes, but then you
may win three times in a row. Just keep playing until you win the desired
amount of money.

Use the Hacker (Flashlight + Computer Case) on ATMs to get $10,000 from
each ATM.

When you see a pile of money ($100) in front of a slot machine, you are
able to win on that slot machine up to five times, and then you will
hardly win on that machine again until you leave the area and come back
again so everything has respawned.


Easy items:
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Leave an area (so that the loading screen appears) that has the items
you want to get more of, then enter the area again, and all objects will
have respawned.