Dead Rising 2/Shout Out

From Case Zero:

 * He may still make you pay for items even after you save his life, but the pawn shop owner is still a lot nicer than that other guy named Dick Jones.
 * Using the strong attack (hold X) with the large kitchen knife you can find in the diner will make Chuck grab a zombie around the waist and stab it in the chest repeatedly while the Psycho Scare Chord plays.
 * There are cardboard standees of Proto Man in the town movie theater.
 * There is a Blue Badger graffiti on the wall in the town.

From the main game:

 * When Frank made Spitfire in the original, it gave him fatal loogies. When Chuck makes Spitfire he is able literally spit a wall of flame.
 * One of the masks is a "goblin mask" that is clearly Blanka from Street Fighter. Furthering the homage is a combo weapon - take the mask, add some batteries, and you have an electricity-spewing Blanka head!
 * One boss fight should possibly remind of another hand-to-hand boss fight from the first one. Especially because you can get disarmed from any weapon unless you fight with your fists.
 * The host and announcers - and the show in general - of Terror Is Reality is one big Shout Out to a similar pay-per-view event, up to and including, taunting you all the while.
 * Yet another and possible subtle one, The Running Man complete with a jumpsuit that matches Arnold's one in the film, and the fact TK is much like Killian.
 * Brandon has a button on his shirt that resembles the Umbrella logo.
 * Many of the Psychopaths in the sequel bear strong similarities to ones from the first game. A few examples:
 * Chuck's rival Motocross racer/Terror is Reality contestant Leon Bell (Kent).
 * Seymour Redding, a power-tripping security guard who's big on public executions (Jo, Sean to a lesser extent).
 * Cannibal chef Antoine Thomas (Larry)
 * Brent Ernst, a socially inept pyromaniac teenager in a mascot costume (Paul, also Adam).
 * Bibi Love, a crazed pop singer with a literally captive audience (Adam, Sean, ).
 * Some of them die similarly to the psychopaths in the first game, like Randy dies.
 * One of the clothes you can wear is a fancy white suit, which resembles the attire of a certain foul-mouthed, zombie-killing convict gambler.
 * When you get a good look at that suit from the front, you can see that it's also a reference to Saturday Night Fever.
 * In that same store, you can assemble an American flag jumpsuit/bike helmet combo reminiscent of famous motorcycle daredevil Evel Knievel.
 * Laser Sword? Almost reminds one of another video game series Inafune worked on.
 * "Look, Dad, I just got a new power in Mega Man!" There's also a store called "Wily Travels" whose description on the map is a hurricane of Mega Man references, and they even have Proto Man as a mascot!
 * Next to it is a store called Albert's Apparel.
 * The Laser Sword is made by combining the flashlight with gems, meaning it's effectively a low-budget [[Star Wars Lightsaber].
 * The battle with appears to be a shout out to Streets of Rage. Fighting  in an ocean-themed nightclub with electronic dance music blaring seems to be more than a coincidence.
 * Katey has a Slime keychain on her backpack.
 * With the obese body shape, pig-themed costume, and giant chainsaw, Randy Tugman seems extremely similar to the final boss of Manhunt, Piggsy. His fighting style is also pretty similar.
 * It's hard to say if it's intentional, but he also reminds many people of Chris-Chan both in looks and personality.
 * You can unlock a Shaun of the Dead outfit.
 * You can dress in a yellow tracksuit and trainers ala Kill Bill/The Game Of Death.
 * Combine yellow suit with knife gloves for low rent Wolverine cosplay. Chuck does appear to copy his basic combo from Marvel vs. Capcom.
 * For whatever reason, the survivor you rescue from Seymour, Ray Teller, looks exactly like Kevin Bacon.
 * The Magician Psychopath Reed resembles Will Ferrell.
 * There's a group of four nerdy guys who show up in South Plaza on Day One, although a lot of players will miss them due to how the game handles spawn timers. The group consists of Steve Urkel, Dr. Horrible, a fat guy in a fuku, and their comparatively normal friend. They're playing a very familiar roleplaying game.
 * The female poker player in the secret group of survivors in the Atlantica casino appears to be an Expy of Jennifer Tilly, who is known for her poker "strategy" of letting her boobs spill out all over the table. One of the other poker players that make up the secret group, Nevada Slim, looks like real-life professional poker player Greg Raymer.
 * One of the achievement names: "Look at all that juice!"
 * Also, the Paddlesaw is pretty much a homebrew edition of Skorge's dual chainsaw staff.
 * The rock band Angel Lust appears to be a joint project between Marilyn Manson, Tommy Lee, and Amy Lee, although they hired a really terrible songwriter.
 * In a reference to two other famous British bands, one of the band members is named Floyd Stone
 * One outfit is a fruity biker getup complete with assless chaps. It is named the "Blue Oyster" after the Gay Bar in Police Academy.
 * You can find Borat's banana hammock. When you put it on, Chuck dances around and says "I'm a big boy now!" and AVERT YOUR EYES.
 * An achievement/trophy is called "He Hasn't Covered Wars..."
 * You're able to get knight armor that makes you look like Arthur from Ghosts N Goblins, and when it shatters you're left in nothing but your underwear.
 * Lenny, an autistic man you can find in the back room of the Yucatan, talks about his affection for numbers and his rich brother Charlie while you're rescuing him. Upon returning to the safe room, he even claims to be an excellent driver.
 * The image painted on the doors of Leon Bell's bike trailer looks like a callback to the tattoo that Steve-o from "Jackass" has on his back.
 * Sgt. Boykin spouts Hudson's lines from Aliens in a custscene.
 * After the S Ending, a zombie pops up like in the infamous K-Fee energy drink adverts.
 * Three sexy girls who are associated with "Guardian Angels" protective services. Charlies Angels, anyone?
 * You can find a comedian named Walter Morris who's dressed a lot like El Chavo. And a possible shout out to Fargo, his notebook description reads "Kinda funny looking".
 * When Chuck is idle with a sword, he slices the air and examines the sword. Sound like another green hero?
 * One of Chuck's possible movie reviews? 100% Rotten.
 * Stacey Forscythe bears a strong resemblance to the post-Heel Face Turn Isabella Keyes.
 * Rebecca Chang seems to be a female incarnation of Frank West - except that she is not a freelance journalist.
 * There's a brand of cereal called Snowflakes that has a tiger mascot. One of the survivors is a tiger called Snowflake.
 * You unlock a familiar hockey mask by using every melee weapon on zombies.

From Case West:

 * "Uh, yeah, we had a slight, uh... alarm malfunction up here, but it's all clear, situation normal."
 * "You're pretty high-strung for a guy who's covered wars."
 * "Come out West, we'll kill some zombies, have a few laughs..."
 * Apparantly there's a Dr. Wily costume.
 * Notice how near the end of ending A has Frank and Chuck standing over a cliff watching the building explode and burn. Also notice how Chuck asks questions to himself like "Is there really a cure from turning into a zombie?"
 * Down in the maintenance tunnel that connects the holding pens to the harvesting room, you can find a message scrawled on the wall in blood that reads "DONT STARTLE THE WITCH!" accompanied by female sobs echoing up from a nearby ventilation grate.
 * When shooting security cameras, Chuck will sometimes say "Good night, Big Brother!".

From Off the Record:

 * Frank's shades say "Damn, I'm looking good" in their description.
 * Proto Man's outfit replaces Arthur's.
 * "Two Girls, One Club."
 * After Frank jumps onto the train, he complains, "I'm too old for this shit."
 * Beating Evan results in a homage to the liquid nitrogen kill from Terminator2.