The Wii Zapper is a gun shell peripheral for the Wii Remote. The name is a reference to the NES Zapper light gun for the Nintendo Entertainment System. It is mainly used for shooter games, including light gun shooters, first-person shooters, and third-person shooters.
According to an interview with Shigeru Miyamoto, the idea of a Zapper-type expansion formed when the Wii Remote was first created. He expressed that "What we found is that the reason we wanted to have a Zapper is when you hold a Wii Remote, it can be difficult for some people to keep a steady hand. And holding your arm out like that can get your arm somewhat tired."
A staff member of The Legend of Zelda: Twilight Princess's development team later created a makeshift gun-like frame using rubber bands and wires, which held the Wii Remote and Nunchuk together. In response, Miyamoto stated "this isn't the time or the place to be making things like this!". However, when Miyamoto held the prototype in his hands, he found it very comfortable. He proposed it to the hardware developers, who started on the formal development project. The Wii Zapper underwent an extensive development period involving many design phases, including one that produced a rumble whenever the player hit a target. To save battery life, the rumble function was abandoned.
A "Zapper" prototype was shown at E3 2006 featuring a shotgun-like design with a "trigger hole", as well as an analog stick built into the top of the handle. This made it similar to the Nunchuk attachment, but without the accelerometer and the second button. In this version, the "gun barrel" of the shell housed the Wii Remote and connected with its expansion port.
A revised design was revealed on July 11, 2007 at E3 2007 with a form reminiscent of a Tommy gun but even more so of a Steyr AUG, in which the Wii Remote is fitted in the gun barrel and the Nunchuk is cradled in the rear handle. This design came about with the realization that making the Wii Zapper functionally independent from attachments would "allow for more diverse play styles." Some concern has been raised by this arrangement, since most people would naturally end up holding the Nunchuk with their dominant hand and be forced to pull the trigger with their non-dominant hand. Third-party titles designed to support the Wii Zapper include Resident Evil: The Umbrella Chronicles, Ghost Squad, Medal of Honor: Heroes 2, The House of the Dead 2 & 3 Return, House of the Dead: Overkill, Call of Duty: World at War, Wild West Guns, Quantum of Solace, Call of Duty: Modern Warfare Reflex Edition, Dead Space: Extraction, Resident Evil: The Darkside Chronicles, Heavy Fire: Special Operations, Mad Dog McCree: Gunslinger Pack, GoldenEye 007 and Call of Duty: Black Ops, while Nintendo has supported it with the first-party WiiWare game, Eco Shooter: Plant 530, as well as with Sin and Punishment: Star Successor.
The Wii Zapper was first released in Japan on October 25, 2007 as a pack-in with Ghost Squad, with standalone units also made available for purchase on Nintendo's Japanese online store. A bundle with Umbrella Chronicles was later released in the region on November 15, 2007. For other regions, the Wii Zapper is packaged with Link's Crossbow Training, a training game based on The Legend of Zelda: Twilight Princess. It was released in North America on November 19, 2007, in Europe on December 7, 2007 and in Australia on December 13, 2007.
Third-party gun accessories
Despite an official Wii Zapper expansion released by Nintendo, some gun peripherals have been shown by third parties. The first of these appeared in early April, when video game retailer GameStop listed a "Wii Blaster" peripheral on its website, with a release date of May 1, 2007. Originally listed without a specified manufacturer, the Wii Blaster had been speculated to be the Zapper, but has since been indicated to be produced by third party accessories manufacturer Core Gamer. According to GameStop on May 5, 2007, the Wii Blaster release date was changed to July 17, 2007 and is available for purchase.
Another variation on the official Wii Zapper is the Wii Light Gun. It is designed much like a sub-machine gun and although it is not sold with any games, it is available for purchase at the GAME website and GAME retailers.
While not technically an expansion, details on an aesthetic gun accessory for the Wii Remote and Nunchuk, named the "Sharp Shooter", have been released by third-party manufacturer Joytech. In this accessory, the Wii Remote is housed in the gun barrel. The Nunchuk is fitted into the handle so that the Nunchuk's buttons serve as gun triggers.
A new gun peripheral, the Perfect Shot, is designed to be an alternative to the Wii Zapper and is designed by Nyko. It has a pistol-like design that uses only the Wii Remote. Below the Perfect Shot is a slot, where the user can attach the Nunchuk or other Wii Remote add-ons. Nyko has also released the Pistol Grip, a gun shell of similar design but only compatible with their Wand Wii Remote alternative, due to its digital inputs using their proprietary expansion port.
Hong Kong-based accessory manufacturer Brando has also released two Wii gun shells: one of them is the 2-in-1 combined light gun, that very closely resembles the Nyko Perfect Shot, while the other one, named the Wii Cyber Gun, is more similar to the Zapper.
A Wii Remote-only gun shell was also released with the game Cocoto Magic Circus.
To coincide with the release of the Nerf N-Strike video game, an arcade-style light gun shooter, Hasbro released the N-Strike Switch Shot EX-3, a functional Nerf dart shooter that can be modified by removing the dart shooting mechanism and replacing it with a Wii Remote to allow it to be used as a light gun shell. The Switch Shot is available both in a bundle with the Nerf N-Strike game and as a separate peripheral.
Other gun peripherals include a Wii Crossbow, a Wii Magnum, and a Wii Shotgun. A handcannon shell was also released in Australia, the U.K. and Europe  with The House of the Dead: Overkill, modeled after the AMS pistols used by the main characters in the game. Another shell shaped like a toy laser gun was released alongside Toy Story Mania! in Europe.
- Dean Takahashi, (July 29, 2007). An interview with...Shigeru Miyamoto mercurynews.com. Retrieved on August 5, 2007.
- Iwata, Satoru (2008-05-08). "Wii.com - Iwata Asks: Link's Crossbow Training". Wii.com. Retrieved 2008-05-09.
- Bozon, Mark (2006-05-10). "E3 2006: Light Gun Shell Revealed!". IGN. Retrieved 2006-05-10.
- Miller, Ross (2006-05-10). "E3: The Wii Zapper prototype revealed". Joystiq. Retrieved 2006-05-11.
- Block, Jerry (2006-07-12). "E3 2007: Wii Zapper Hands On Impressions". IGN. Retrieved 2007-10-17.
- E3 '07: Wii Mario Kart pulls drive-by on Nintendo gathering - Wii News at GameSpot
-  Archived October 14, 2007 at the Wayback Machine
- "Wii Zapper gets a release date, price for Australia". The Gamer Gene.
- "Nintendojo.com: Nintendo News, Previews, Reviews, Editorials and Interaction". nintendojo.com.
- Gamestop.com - Buy Wii Blaster - Wii
- "GAME - Consoles & Games - Free UK Delivery Available!". game.co.uk.
- "Wii Sharp Shooter "Light Gun" Accessory For Wii Controllers". Gaming Bits.
- "Nyko Perfect Shot," Game Informer 178 (February 2008): 44.
- North, Dale (January 11, 2009). "CES 2009: Nyko's Wand Wii controller hands-on". Destructoid. Retrieved August 13, 2011.
- Wii Guns - Get a Wii Gun
- JC Fletcher. "Official House of the Dead: Overkill Hand Cannon: shoot like G does". Joystiq.
- Michael McWhertor. "The House Of The Dead Overkill Gets A Hand Cannon". Kotaku.