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.
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.
Willemette Mall: Rescue 50 survivors.

Ghosts 'n Goblins knight armor
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
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
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
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
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.

Magazine duplication
This trick requires two players. Start a game, and grab the magazine you want to duplicate. Then, have player two do the same in their own game. Have both players save the game. Next, have player two join player one's game through Co-op, drop the magazine, and then leave the game. Have player one pick up the magazine, and save the game. Player one will now have two copies of the magazine. You can repeat this process until you get twelve of the same magazine. Thus, if you have 12 Bargaining magazines, the price at pawnshops decreases 120%. If you have 12 Driving magazines, you will basically have an indestructible SUV.

Faster start in New Game+ mode
Successfully complete the game, and start a New Game+ session. Skip the opening cutscene to also advance past the "Terror Is Reality" section until your arrival at the emergency bunker.

Weapon combos and Combo Card locations
Successfully complete the indicated task to get the corresponding Combo Card. Combine the indicated items to create the corresponding weapon:

Combo Cards unlocked by saving survivors

I.E.D. (Propane Tank + Box of Nails): Save LaShawndra Dawkins.
Plate Launcher (Plates + Cement Saw): Found during "Tape It or Die".
Blazing Aces (Tennis Racket + Tiki Torch): Save all four "Tape It or Die" members.
Exsanguinator (Vacuum Cleaner + Saw Blade): Save all four "Tape It or Die" members.
Power Guitar (Electric Guitar + Amplifier): Save the members of Angel Lust.

Combo Cards unlocked by defeating psychopaths

Flamethrower (Gasoline Canister + Water Gun): Defeat Brent Ernst.
Rocket Launcher (Rocket Fireworks + Lead Pipe): Defeat Roger and Reed.

Combo Cards unlocked by leveling up

Molotov (Whiskey + Newspaper)
Pole Weapon (Push Broom + Machete)
Air Horn (Pylon + Spray Paint)
Gem Blower (Leaf Blower + Gems)
Fountain Lizard (Lizard Mask + Fountain Fireworks)
Hacker (Flashlight + Computer Case)
Heliblade (Toy Helicopter + Machete)
Flaming Gloves (Boxing Gloves + Motor Oil)
Electric Chair (Wheelchair + Battery)
Ripper (Cement Saw + Saw Blade)
Fire Spitter (Toy Spitball Gun + Tiki Torch)
Sticky Bomb (Lawn Dart + Dynamite)
Driller (Power Drill + Spear)
Defiler (Sledgehammer + Fire Axe)
Knife Gloves (Bowie Knife + Boxing Gloves)
Dynameat (Hunk of Meat + Dynamite)
Electric Rake (Battery + Leaf Rake)
Parablower (Leaf Blower + Parasol)
Hail Mary (Football + Grenade)
Roaring Thunder (Battery + Goblin Mask)
Blitzkrieg (Electric Chair + Assault Rifle or LMG)
Super Slicer (Servbot Mask + Lawnmower)
Beer Hat (Beer + Construction Hat)
Handychipper (Wheelchair + Lawnmower)
Boomstick (Shotgun + Pitchfork)
Auger (Pitchfork + Drill Motor)
Infernal Arms (Training Sword + Motor Oil)
Porta-Mower (2x4 + Lawnmower)
Freezer Bomb (Fire Extinguisher + Dynamite)
Zombie Thrower (Spear + Leaf Blower)
Tesla Ball (Bingo Ball Cage + Battery)
Super B.F.G. (B.F.G. + Amplifier)

Combo Cards found by location

Blambow (Bow and Arrow + Dynamite): Examine the "Revenginator 7" movie poster on the south side of Cucina Donnacci in the Food Court.

Burning Skull (Bull Skull + Motor Oil): Pay a total of $1,200,000 to the fortune teller outside of One Little Duck Bingo on the Silver Strip.

Freedom Bear (Robot Bear + LMG): Examine the Clint Rockfoot "Stop Or My Bear Will Shoot!" movie poster outside the men's bathroom in the Yucatan Casino.

Holy Arms (Training Sword + Box of Nails): Examine the "Pit Viking" movie poster in the Atlantica Casino near the Fortune Park entrance.

Laser Sword (Gems + Flashlight): Examine the "Laser Knight" movie poster at the back of the Paradise Platinum Screens theater on the Platinum Strip.

Paddlesaw (Paddle + Chainsaw): Examine the "Paddle Party Massacre" movie poster in front of Slot Ranch Casino.

Snowball Cannon (Fire Extinguisher + Water Gun): Examine the "Dr. Brainfreeze" movie poster on the second floor of the Palisades Mall (between Ned's Knicknackery and Brand New U).

Spiked Bat (Baseball Bat + Box of Nails): Unlocked when visiting the first maintenance room.

Tenderizers (MMA Gloves + Box of Nails): Examine the "Blood Round 4" movie poster in Royal Flush Plaza

Secret Combo Card

Wingman (Queen + Nectar): Combine Queen and Nectar to unlock this secret Combo Card.

Additionally, you can create vehicle-weapon combos after you unlock the motorcycle trailer by completing the "Here Come The Contestants" mission:

Machine Gun Motorcycle (Motorcycle + LMG)

Rabbit Motorcycle (Motorcycle + Giant Stuffed Rabbit): The Giant Stuffed Rabbit is found on top of Moe's Maginations (S105) on the Platinum Strip. You get 10 PP for every zombie killed.

Slicecycle (Motorcycle + Chainsaw)

Juice combinations
Mix the indicated ingredients to create a juice with the corresponding effect. Note: All drinks also give you full health. There are nine different types of drinks you can create. It is possible to find the necessary ingredients in the Food Court to make all nine drinks and get the "Look At All That Juice!" trophy.

Energizer (Chuck cannot be injured for ten seconds.): Chili + Chili
Energizer: Taco + Hamburger
Nectar (Attracts any nearby Queens to Chuck for six minutes, and spawns one Queen nearby.): Orange Juice + Orange Juice
Nectar: Jelly Beans + Beer
Nectar: Onion Rings + Orange Juice
Pain Killer (Chuck takes only half physical damage for one minute.): Beer + Beer
Pain Killer: Vodka + Vodka
Quick Step (Increases Chuck's movement speed drastically for one minute.): Milk + Jelly Beans
Quick Step: Wine + Beer
Quick Step: Bacon + Pie
Randomizer (Gives Chuck stomach pains that makes him puke. He throws up three times over three minutes.): Beer + Cooking Oil
Randomizer: Wine + Vodka
Repulse (Zombies cannot and will not try to attack you for one minute. It overrides Zombait while in effect.): Bacon + Chili
Repulse: Chili + Large Soda
Repulse: Chili + Ketchup
Repulse: Chili + Onion Rings
Repulse: Chili + Pie
Spitfire (Changes Chuck's harmless ability to spit at zombies into a short range flame burst for one minute.): Bacon + Onion Rings
Spitfire: Ketchup + Ketchup
Spitfire: Bacon + Orange Juice
Spitfire: Chili + Orange Juice
Untouchable (Chuck cannot be grabbed by Zombies but can still suffer damage from their attacks for one minute.): Bacon + Bacon
Untouchable: Pizza + Large Soda
Untouchable: Bacon + Milk
Untouchable: Chili + Milk
Untouchable: Onion Rings + Milk
Untouchable: Onion Rings + Pie
Untouchable: Pie + Orange Juice
Untouchable: Orange Juice + Milk
Zombait (Zombies are more attracted to Chuck for one minute, which can aid in distracting zombies from survivors.): Jelly Beans + Chili
Zombait: Apple + Taco
Zombait: Pie + Milk

Blender locations
Search the indicated locations to find blenders to mix drinks:

Baron Von Brathaus (Yucatan Casino)
Juggz Bar (Platinum Strip)
Palisades Mall (grotto bar on first floor)
Pub O' Gold (Silver Strip)
Rojo Diablo Mexican Restaurant (Food Court)
Shots & Awe (Americana Casino)
Sipparellos (Atlantica Casino)
Slot Ranch Casino (at the bar)

Magazine locations
Search the indicated location to find the corresponding magazine:

Amusement (toy items last three times longer): Ultimate Playhouse (first floor in Palisades Mall - P103)
Bargaining (lowers pawn shop items cost by 10%): Next to the Zombrex in Bennie Jack's BBQ Shack in the Americana Casino
Bikes (bikes last three times longer): Side room off northern most room in Slot Ranch Casino
Building (construction items last three times longer): In South Plaza on scaffolding in the large east west hallway between the two southernmost maintenance rooms
Blades (edged weapons last three times longer): Underground, north of the only save point underground
Combat 1 (10% PP boost earned from weapon kills): Stan's Large Print Books and Magazines (second floor in Palisades Mall - P206)
Combat 2 (10% PP boost earned from weapon kills): Yesterday, Today & Tomorrow (first floor in Royal Flush Plaza - R114)
Combat 3 (10% PP boost earned from weapon kills): Underground, near the westernmost underground access point
Domestic (funiture items last three times longer): Maintenance room in Fortune Park
Drinking (never get sick from drinking alcohol): In the Atlantica Casino on an overhead platform north of Sipparellos
Driving (4 wheel vehicle durability last three times longer): Top middle area on the first floor in Bennie Jack's BBQ Shack in the Americana Casino
Gambling 1 (significantly increase your chances of winning money): Ragazines (second floor in Royal Flush Plaza - R212)
Gambling 2 (significantly increase your chances of winning money): Stan's Large Print Books and Magazines (second floor in Palisades Mall - P206)
Gambling 3 (significantly increase your chances of winning money): Shamrock Casino (Silver Strip - H106)
Games (entertainment items last three times longer): Near seats in the northern semicircle in the Atlantica Casino
Health 1 (+50% health restored from eating food items): Yesterday, Today & Tomorrow (first floor in Royal Flush Plaza - R114)
Health 2 (+100% health restored from eating food items): Baron Von Brathaus (Yucatan Casino - Y101)
Hand to Hand (bare-handed attacks a significant boost in power): Ragazines (R212) on the second floor in Royal Flush Plaza
Horror (25% PP boost for killing zombies): Ragazines (R212) on the second floor in Royal Flush Plaza
Horror 2 (25% PP boost for killing zombies): Stan's Large Print Books and Magazines (second floor in Palisades Mall - P206)
Juice Boost (consumed juices lasts twice as long): On the Silver Strip, just east of Luali Wauwii.
Leadership (survivors more effective): One Little Duck Bingo on the Silver Strip
Playboy (10% PP boost from activities involving female survivors): In the center of Palisades Mall on the first floor near what looks like a pond on the map
Psychos (25% PP boost from defeating psychos): Roof of Paradise Platinum Screens theater on the Platinum Strip
Rescue (25% PP boost from survivor activities): First floor of Fortune City Arena in the room near the western most maintenance room
Skateboarding (skateboard lasts three times longer and gain a trick): First floor of the Fortune City Hotel
Sports (sports items last three times longer): Stan's Large Print Books and Magazines (second floor in Palisades Mall - P206)

Gift locations
Search the indicated locations to find all 11 gifts for Katey and get the "Father Of The Year" trophy:

Robot bear
Bag of marbles
Beach ball
Stick pony
Giant stuffed donkey
Giant stuffed elephant
Giant stuffed bull
Water gun
Giant stuffed rabbit
Tiger (give it steak or ribs to tame it)
Funny painting (obtained on the Case 4 mission "Art Appreciation")

Hidden combo card locations
Search the indicated locations to find all nine secret combo cards and get the "Curiously Inventive" trophy:

Free Zombrex locations
Search the listed location or complete the indicated task to get free Zombrex:

In Big Roy's Mart in Royal Flush Plaza (case related).
Go to the stairs in Bennie Jack's BBQ Shack in the Americana Casino and turn right when going up the stairs to the second floor. Jump on the balcony and then onto the closest light. Keep jumping across the lights until you reach the end.
Backstage behind the curtain at Slot Ranch Casino. Climb up a stack of boxes and speakers. Jump onto a smaller stack of boxes and speakers to find it.
Directly under the Atlantica Casino (Underground Access). The underground path overlaps the upper edge of the casino. The Zombrex is near an access ladder on a raised walkway.
Save the paramedic in the "Code Blue" mission. Bring the paramedic to Dean ("Once Bitten" mission), and the paramedic will give Dean a free Zombrex.
On top of the tallest slot machine display in the middle of Yucatan Casino.
Defeat the Postal Worker (mission related) in Royal Flush Plaza.
Bring Richard (Hunger Pains) food and rescue him in the Silver Strip Diner.

Zombrex poster locations
Search the indicated locations to find all 33 Zombrex posters. Spray paint all Zombrex posters to get the "Improper Behavior" trophy. You can find green spray paint in front of the maintenance room in the Food Court or in the entrance hall of the Fortune City arena. The green spray paints are the easiest to find, and you can collect them quickly by using the "Easy items" trick. Use this trick to get a enough spray paint for all 33 Zombrex posters so you do not need to go back and look for new spray paint. You will need approximately six spray paints. The color of the spray paint does not matter. Note: There is one bonus poster that can only be found during Case 3-2 (in the Americana casino in the room with the mercenaries).

Transporting survivors
Instead of carrying survivors in your arms or on your back, push a wheelchair up to them, and wait for them sit down. You can then run them back to the safehouse easily. Do not hit too many zombies or walls with the wheelchair or you will dump the survivor and the wheelchair will break.

Spit attack
While unarmed, hold [Aim] and press [Throw] or [Fire]. Although it will not do much damage, it can be done an unlimited number of times.

Defeating psychopaths
You can defeat most psychopaths by attacking them with the Knife Gloves (Bowie Knife + Boxing Gloves) while under the effect of the Pain Killer drink (Beer + Beer or Vodka + Vodka).

Defeating Leon
Stand near any ledge you can jump on. When you hear Leon coming, try to get him to hit the ledge and get stuck. Then, jump on the ledge, and simply keep hitting him with a melee weapon until he has been defeated.

Try to lure Leon into a maintenance room. Then, close the doors, and keep hitting him with a melee weapon until he has been defeated.

Get the motorbike from the front of the arena. Drive it to the fireworks store on the Silver Strip. Get rockets, and ride the bike to the alley with the maintenance room. Get a lead pipe, then ride the bike to the rock canyon. Enter the maintenance room in the rocks, and create a rocket launcher. Exit the maintenance room, and stand in the left-side corner. Then, save the game. When Leon appears from the left side, he will run into the wall. Keep shooting him with the rocket launcher until he has been defeated.

Defeating Sergeant Psycho
When you go down the tunnels, go directly to the second maintenance room on the left side, following the arrow towards the mission. There is a Servbot mask and lawnmower outside. Combine them to make the Super Slicer, and bring it to the fight. Whenever he stops to reload, charge at him with the Super Slicer on. If done correctly, you can defeat him in approximately five hits.

Use the following trick to easily kill Sgt. Dwight during Case 6-2. When you enter Fortune Park, buy the SUV key from the pawnshop on the Silver Strip for $2 million. Then, go to the entrance of the Shamrock Casino (Silver Strip - H106), and get the SUV. Drive to the entrance of the underground area. Squeeze the SUV into the underground area. When you get to the entrance for the loading bay, notice that it is blocked off by a line of large boxes. It is possible to drive over these boxes and squeeze the SUV under the security gate, which will trigger the cutscene for the battle with Sgt. Dwight. After the cutscene, you will be on foot again. However, if you look at where you entered, you will see the SUV is stuck halfway in the room. Get in the SUV, and squeeze it in the rest of the way. You can now use it to kill Sgt. Dwight.

Defeating Slappy
Get one or two squirt guns from inside the toy shop where you fight Slappy. Shoot him with the squirt gun a few times. He will then struggle with his flamethrower, giving you a chance to attack him with a melee weapon (spiked bat or Defiler recommended) before taking cover again. Repeat this process until you defeat him.

Clothing list
The following is a list of the clothes available in the game:

Head

American Showman Helmet
Bald
Baseball Cap (Sport)
Baseball Cap (TIR)
Beard (found at the "Wave Of Style" hairdresser's shop in Royal Flush Plaza)
Black Rimmed Glasses
Cowboy Hat (Black)
Cowboy Hat (White)
Dark Aviator Glasses
Dealer Visor
Fedora
Flower Head Piece
Football Helmet
Full Beard with Moustache
Goblin Mask
Hair Blue
Hair Grey
Hair Pink
Hygine Mask
Kids Super Hero Mask
Knight's Helmet
Knit Hat
Ladies Hat
Lizard Mask
Mohawk
Novelty Glasses
Rocker's Glasses
Russian Hat
Servbot Mask
Show Girl Head Piece
Sports Glasses
Swat Helmet
Tennis Head Band
Tourist Boat Hat
Wild Frontier Hat
Yellow Tinted Glasses
Zombie Mask

Body

American Showman
Army Jacket Pants
Banana Hammock
Baseball Uniform
Basketball Uniform
Boardwalk Apparel
Blue Grey Work Overalls
Blue Oyster Biker Outfit
Business Casual
Casual Beachware
Collegiate Ensemble
Cowboy (Black)
Cowboy (White)
Dealer Outfit
Fishnet Shirt White Pants
Football Uniform
Fortune City Shirt (Grey)
Fortune City Shirt (Red)
Hip Hop Outfit
Hawaiian Holiday Gear
Hula Dress
Kids Superhero Costume
Knight's Armor
Knotted Top Cutoffs
Loud Summer Special
Mid Length T-shirt Jeans ("Tape It or Die" basement)
One Piece Pajama
Plaid Suit
Polo Shirt Jeans
Skater Outfit
Sporty Tracksuit
Summer Dress
Surf Wetsuit
Swat Outfit
Tan Jacket
Tennis Outfit
TIR Shirt (Blue)
Toddler Outfit
Tube Top Mini Skirt
Tuxedo
White Leisure Suit
Yellow Track Suit

Feet

Bare Feet
Basketball High Tops
Black Canvas
Black Dress Shoes
Black Military Boots
Bunny Slippers
Cleats
Cowboy Boots (Black)
Cowboy Boots (White)
Flip Flops
Go Go Boots
Knight's Boots
Sandals White Socks
Superhero Boots
White Low Heels
White Tennis Shoes/Socks
Yellow Sneakers

Change into all these clothes and shoes to get the "Chuck Greene: Crosso Dresser?" trophy.

Food list
The following is a list of the food available in the game:

Food

Apple
BBQ Chicken
BBQ Ribs
Bacon
Baked Potato
Beans
Brownie
Burrito
Cake
Chili
Cookies
Donuts
Fish
Fries
Hamburger
Hotdog
Ice Cream
Jelly Beans
Lobster
Melon
Onion Ring
Pasta
Pie
Pineapple
Pizza
Snack
Steak
Sushi
Taco

Drinks

Coffee
Coffee Creamer
Large Soda
Milk
Orange Juice
Beer
Drink Cocktail
Vodka
Whiskey
Wine

Consume all these foods to get the "Finally Full" trophy.

Weapons list
The following is a list of the weapons available in the game:

Firearms

Assault Rifle
BFG
Handgun
LMG
Mercenary Rifle
Shotgun
Six Shooter
Sniper Rifle

Use all of these firearms on a zombie to get the "He Hasn't Covered Wars..." trophy.

Explosives

Acetylene Tank
Dynamite
Gasoline canister
Grenade
Propane Tank
Rocket Firework

Use all of these explosives on a zombie to get the "Explosive Temper" trophy.

Melee

Battle Axe
Bowie Knife
Broadsword
Chef's Knife
Fireaxe
Giant Pink Chainsaw (found by killing Randy in the "Here Comes The Groom" mission)
Katana (found by killing the Twins in Case 4-1)
Lance
Machete
Magicians Sword (found by killing the Magician in the "World's Deadliest Trick" mission)
Meat Cleaver
Nightstick
Sledgehammer
Spear
Tomahawk

Use all of these melee weapons on a zombie to get the "Head Trauma" trophy.

Novelty

Bag of Marbles
Beachball
Bucket
Casino Chips
Cardboard Cutout
Fancy Painting
Funny Painting (throw it at a zombie to avoid breakage if it is a gift for Katey)
Giant Dice
Robot Bear
Giant Stuffed Bull
Giant Stuffed Donkey
Giant Stuffed Elephant
Giant Stuffed Rabbit
Goblin Mask
Hunk of Meat
Liberty Torch
Lizard Mask
Novelty Beer Mug
Novelty Bottle
Novelty Cell Phone
Novelty Perfume
Novelty Poker Chip
Painting
Playing Cards
Small Painting
Spitball Gun
Pylon
Servbot Mask
Pony on Stick
Tiki Mask
Tyre
Toy Helicopter
Treasure Chest
Water Gun
Wacky Hammer
Whipped Cream
Zombie Mask

Use all of these novelty weapons on a zombie to get the "Slaughter - S = Laughter!" trophy.

Ranged

Basketball
Bow and Arrow
Football
Gems
Golf Club
Lawn Dart
Metal Baseball Bat
Music Discs
Nails
Plates
Sawblade
Soccerball
Tennis Racquet
Vinyl Records

Use all of these ranged weapons on a zombie to get the "Death From Afar" trophy.

Easy "Masquerade" trophy
Go to Ye Olde Toybox (R107) on the first floor in Royal Flush Plaza. There is an unlimited pile of Lizard Masks. Keep picking up and putting the masks on nearby zombies until you get the "Masquerade" trophy.

Easy "Stick 'Em Up" trophy
Go to Baron Von Brathaus (Y101) in Yucatan Casino. Grab the Mona Lisa painting by the front register and the other painting next to it. Grab the Servbot Mask on the table. Find a nearby zombie, and slam the Mona Lisa painting on it. Slam the other painting on it. Slam the Servbot Mask on it. Then, grab a Large Barrel outside Baron Von Brathaus, and slam it on the zombie with a hard attack to get the "Stick 'Em Up" trophy.

Easy "Tape It Or DIE!" trophy
Combine Queen and Nectar to create the Wingman secret Combo Card and get the "Tape It Or DIE!" trophy. To easily get a Queen, create and drink the Nectar juice (Orange Juice + Orange Juice) to spawn a Queen nearby. Then, simply capture the Queen. Note: The zombies that put their arms in the air (usually in a crowd) sometimes have a Queen. To find such zombies, you need to progress in the story a bit, and they will spawn after you give Katey Zombrex for the second time. To get Nectar, you can combine Beer and Jelly Beans. You can create Nectar with other food and drinks as well, but this combination seems to be the easiest and fastest.

Easy "The Skill To Survive" trophy
Before the psychopath battle with Ted at the Yucatan Casino, collect four steaks. Then, defeat Ted without hitting Snowflake in the process. Once Ted has been killed, continue running from Snowflake, but periodically drop the steaks as you go. Lead Snowflake in circles until she has eaten all the steaks, making sure not to attack her. Shortly after Snowflake is full, a cutscene will play, and you will get "The Skill To Survive" trophy.

Easy "Zombie Slaughter", "Zombie Destruction", "Z-Genocider 2: Genocide Harder", and "Zombie Genocide Master" trophies

Buy the SUV key from the pawnshop on the Silver Strip for $2 million. Then, restart the story (you will still keep the SUV key). Immediately get the driving magazine in Bennie Jack's BBQ Shack in the Americana Casino. Go to the entrance of the Shamrock Casino (Silver Strip - H106), and get the SUV. Drive it around the Silver Strip and Platinum Strip killing as many zombies as possible. Once the SUV is almost destroyed, enter and exit the Yucatan Casino quickly. Go back to the Shamrock Casino to get a new SUV. Repeat this process until you get the "Zombie Genocide Master" trophy. It is possible to kill over 90,000 zombies from Day 1 through Day 4 by doing nothing but this. It is a very slow process that requires a lot of time and patients. Note: You only get the "Zombie Genocide Master" trophy for killing 72,000 zombies, unlike in the original Dead Rising where you got the Mega Buster for killing 53,596 zombies. Additionally, zombie kills are the only thing that does not carry over from a previous game. You must get the required number of zombie kills in one game.

Trophies
Successfully complete one of the following tasks to get a trophy:

Zombie Slaughter (Bronze): Kill 500 zombies.
Zombie Destruction (Bronze): Kill 5,000 zombies.
Vigilante Justice (Bronze): Defeat 5 psychopaths.
Judge, Jury and Executioner (Bronze): Defeat 10 psychopaths.
Zombie Fu (Bronze): Kill 1,000 zombies barehanded.
Wrong Kind of Chopper (Bronze): Kill 1,000 zombies while riding a motorcycle.
He hasn't covered wars... (Bronze): Use every type of firearm on a zombie.
Head Trauma (Bronze): Use every type of melee weapon on a zombie.
Death From Afar (Bronze): Use every type of ranged weapon on a zombie.
Explosive Temper (Bronze): Use every type of explosive on a zombie.
Death of Comedy (Bronze): Use every type of novelty weapon on a zombie.
Come On Follow Mw (Bronze): Escort 8 survivors at once.
Saving the Day (Bronze): Save 10 survivors.
Hero of Fortune City (Bronze): Save 50 survivors.
Needs More Chainsaw (Bronze): Create a combo weapon.
Duct Tape FTW (Bronze): Create all combo weapons.
Apprentice Rising (Bronze): Reach level 25.
Professional Rising (Bronze): Reach level 50.
Fashion Aficionado (Bronze): Change into 10 different pieces of clothing.
Chuck Greene: Cross Dresser? (Bronze): Change into all pieces of clothing in the game.
Bartender (Bronze): Mix a drink.
Look at All That Juice (Bronze): Create and consume all mixed drinks in the game.
Finally Full (Bronze): Eat all types of food in the game.
Having A Gas (Bronze): Kill 1,000 gas zombies.
Father of the Month (Bronze): Give Katey a gift.
Father of the Year (Bronze): Give Katey all possible gifts.
Better With A Friend (Bronze): Solve all case files in Co-op mode.
Don't You Die On Me (Bronze): Revive another player in Co-op mode.
Big Spender (Bronze): Spend $6,000,000 in Fortune City.
Window Shopper (Bronze): Enter all stores in the game.
Masquerade (Bronze): Have 10 zombies with masks on at once.
Improper Behavior (Bronze): Spraypaint all Zombrex posters.
TK's Favorite (Bronze): Play and win in all 9 TIR events.
Rising Star (Bronze): Come in first place in a single TIR event.
Win Big! (Bronze): Finish in first place in a TIR episode.
Custom Finish (Bronze): Give your bike a custom paint job.
Curiously Inventive (Bronze): Collect all combo cards hidden in Fortune City.
Life Saver (Bronze): Collect all combo cards from survivors.
Tough Guy (Bronze): Collect all combo cards from psychopaths.
Half Deck (Bronze): Collect 25 combo cards.
Smashy (Bronze): Smash 100 zombies using the Smash skill move.
Stick 'em up! (Bronze): Stick it to a zombie by covering him in weapons and objects.
Skill to Survive (Bronze): Tame Snowflake.
Z-Genocider 2: Genocide Harder (Silver): Kill 53,596 zombies.
Clean Record (Silver): Complete The Facts.
Justice Served (Silver): Complete Overtime.
Zombie Genocide Master (Gold): Kill 72,000 zombies.
Full Deck (Gold): Collect all combo cards.
Data Miner (Gold): Fill all entries in the notebook.
DR2 Trophy Master (Platinum): You have acquired all the trophies in Dead Rising 2.

Additionally, there is one secret trophy:

Tape It Or DIE! (Bronze): Discovered the secret combo card. Did you cheat by checking online?

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