The House of the Dead 4

Player characters are equipped with submachine guns in this game, as opposed to semiautomatic pistols in the first two or shotguns in the third. The gun will fire in fully automatic mode as long as the trigger is depressed, and can be reloaded by shaking it or pointing away from the screen. Players can also find and throw grenades to destroy large numbers of enemies at once. Additional grenades can be earned by completing certain tasks or by shooting crates. At some points in the game, players are required to shake the gun vigorously in order to escape certain situations.

The game features branching paths. Most of the paths lead to the same point in the game's story. As with The House of the Dead III, there is an end-of-stage bonus where players can receive extra lives depending on headshot level combo, accuracy, and score. Another returning factor is the presence of the "Cancel" bar.

The game runs on a critical shots counter where the player is encouraged to shoot the enemy's weak points rather than spraying ammo at the enemy. It starts off as Good, Excellent, Amazing and then Perfect. Getting hit, or killing an enemy not by the weak point resets the counter.

The most common enemies have three attacks: a "normal attack", a "grab," and a "push". The foremost inflicts one point of damage, while the second forces a shaking sequence that, if successful, pushes back attackers for easier disposal, but if unsuccessful, will result in the player being bitten or the player's character being knocked down and vulnerable. Multiple zombies may also pile on top of both players in an attempt to stomp on them (or kick them while they're down).

There are also a number of secrets in the game. Different hidden treasures, such as coins and golden shapes, which increase the player's score, as well as "lives", etc. can be found by interacting with the game's environments. The bonus-life system departs from the previous games, where life is gained by saving hostages; the loss of these events are substituted with an increase of extra-life pickups in the environment. There are also "treasure rooms" that can be accessed using different techniques (such as shooting a certain spot or throwing a grenade in a certain area), which contain multiple items that can be obtained at once within a limited time.

In 2003, three years after the Caleb Goldman Case, veteran American AMS agent James Taylor, and a new rookie agent, Kate Green, are gathering intelligence at the fifth basement floor of the European headquarters of the AMS in Italy (イギリス London in the Japanese dub). James has a sharp memory of the Caleb Goldman Case, and believes that the ordeal hasn't yet ended. A sudden earthquake rocks the room while they talk, collapsing the basement walls and leaving the agents trapped.

Several days later, as the two await a rescue team, James' PDA goes off, and a group of undead are seen on the security cameras. Realizing that they are in danger, James has Kate gather all the weaponry they can find to defend themselves. Soon after, the two travel through the sewers to an information room where they uncover a plot to fire nuclear missiles worldwide within 24 hours' time, facing the four-armed giant zombie Justice and a pair of mutant tarantulas known as The Lovers along the way. Taking the subway into zombie-infested streets from an underground shopping district, the agents narrowly avoid attacks by The Empress, a double-ended chainsaw-wielding assassin, and the massive, obese, and nearly impervious Temperance.

James and Kate then learn that the late one-time CEO of the now-defunct DBR Corporation, Caleb Goldman, is responsible for the resurgence of undead. All of his messages and current plans were set in motion even before his death. Upon reaching the surface, they find the city completely obliterated. Goldman sends them a PDA message indicating that the launch will occur in one hour. The agents head for the abandoned Goldman Building and upon arrival, a levitating humanoid named The Star, confronts them in the foyer. After the Star is defeated, the duo arrive in time to halt the missile launch, though it is revealed that Goldman's true intention is to revert humankind to its original state in order to prevent them from harming the planet further. As such, his final legacy, The World, an insectoid humanoid with powers over ice, is released in the opening of "Pandora's Box" to fulfill its role as the successor to his original Emperor project in 2000, having developed underground since his death. As the AMS agents fight it, the World continuously evolves to become larger and more powerful. Following the World's second defeat, James sets his PDA to self-destruct and, telling Kate Green not to give up hope, sacrifices himself to destroy the World in the ensuing explosion. A shaken and distraught Kate Green walks out of Caleb Goldman's premises.

The House of the Dead 4 Special flyer, showing the theater unit and the seat

The House of the Dead 4 Special is a two-player attraction based on The House of the Dead 4. The game makes use of two 100-inch screens, one in front of the players and another behind, as well as a five-speaker sound system, giving the impression that enemies are attacking from all directions. The seat shakes when zombies attack, and players are blasted with air whenever they take damage. The seat automatically rotates to face the players towards whichever screen zombies are attacking from. The game also features a new addition of a life bar. As the players are hit the life bar diminishes. If the life bar is reduced to zero the game is over. There are no continues. The PlayStation 3 port of The House of the Dead 4 Special is unlocked by completing The House of the Dead 4 for the first time. However, it uses lives rather than the life bar and allow players to continue.

This game features a side story in The House of the Dead plotline, taking place shortly after The House of the Dead 4, with Kate Green teaming up with Agent "G" to destroy the zombie infestation at its source, leading them to confront the Magician, a boss character who returns after having been obliterated in the first two installments. This game only features two bosses, Justice (Type 0053) and The Magician (Type 0); "G" and Kate encounter the latter boss in a room of a building that "G" believes to be the source of the zombie infestation. In order to defeat the Magician, players must reduce its life bar to zero, then throw a grenade within 10 seconds to destroy a controller it picks up.

In a two-player game, players are judged on how compatible they are based on performance alone.[6]

In America, there is currently only one location that this version of the game can be seen: The machine is located at Dezerland Park in Orlando, Florida. This game has also been spotted in Europe, Japan, Brazil, Russia, Dubai, the Macau Fisherman's Wharf, and in Hong Kong Mega Box.

The original arcade game received positive reviews when it was released. In July 2005, IGN said it "may be the most visually impressive arcade game ever made," noting the improved lighting and the zombie and environmental details. They also praised the gameplay, including the increased number of zombies on screen, "intense" experience, boss battles, the use of machine guns, and the light gun's new shaking detection feature.[2] The same month, 1UP praised the "next-gen visuals" and the improvements to the gameplay, such as the new "shaking" gameplay mechanic and the "hordes of zombies on screen at once."[9] Arcade Belgium praised the arcade game, including the graphics, noting "thirty or so enemies at the same time" with each "very detailed" and "behaving his own way", as well as "bump mapping (seen for instance on enemies' visible muscles)," complex lightning effects such as reflections, particle effects on impact, "fog (in the sewers)," high polygon counts for each monster, realistic water, and elaborate scenery. They also praised the gameplay, including the new lighter gun, "emergency grenades, new reloading method" and the "gun shaking" trick. They gave it ratings, out of 20, of 17 for addictiveness, 18 for graphics, 16 for sound, and 17 for gameplay, with 17 out of 20 overall.[10]

• Sega's official Japanese The House of the Dead 4 page