(Sega AM1's universe)
The PDA is depicted as a silver-and-black-colored device with numerous buttons, a joystick, and what appears to be a camera lens on the top right corner. It is equipped with a blinking red light when threats are detected. The word "AMS" is written below the screen.
While escaping the creature-infested AMS European branch office, agent James Taylor introduced the PDA to newcomer Kate Green when they encountered a fork in their path. The PDA identified the left path as safer than the right, though it is ultimately the player's decision as to where the agents traveled.
The agents later encountered Justice, a massive four-armed creature in the AMS sewers. The PDA scanned Justice (and all further bosses), marking body parts as either "No Damage" or "Weak Point"; the latter, in this case, was Justice's tongue.
Finding the city in ruins, James received a message on his PDA from Caleb Goldman, the deceased financier of the DBR Corporation and Dr. Curien's financier. Goldman revealed his responsibility for the outbreak and that a nuclear missile launch would commence in an hour.
James and Kate raced to Goldman Building[sic], managing to halt the launch but faced with Goldman's final creation, The World. The PDA listed its weak point as "UNKNOWN". Realizing that The World kept growing when killed, James set his PDA to self-destruct and sacrificed himself in the resulting explosion, finally killing the creature.
In The House of the Dead 4 Special, the PDA functions the same. As with The World, it couldn't identify Magician's weak points (though it's most likely from Kate's PDA, since G's would easily recognize the Magician's weak points).
The PDA's abilities are relatively unchanged. Its appearance is reminiscent of modern smartphones, featuring a large touchscreen. Kate and partner Ryan Taylor also have red and black cases, respectively. When encountering The Chariot[sic] and all further bosses, Kate uses the PDA's camera to identify its weak point. The PDA can also be used to unlock electronic doors.
- Previous games in the mainline The House of the Dead series identified boss' weak points differently:
- The House of the Dead featured research blueprints.
- The House of the Dead 2 had a field journal written by AMS agent G.
- The House of the Dead III uses an electronic device similar to a PDA that appears on the side of the screen whenever a boss is encountered, acting as a scanner for weak points. Although the device is implied to be an AMS PDA, it is not shown in the characters' hands.
The House of the Dead 4
House of the Dead: Scarlet Dawn