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Sega AM Research & Development No. 1 (Sega AM1 for short), formerly known as Wow Entertainment, is a arcade and smartphone game development division within Japanese video game developer Sega. It is the creator of the House of the Dead video game series. A majority of the studio's leadership was held by Rikiya Nakagawa, who operated as president for a decade before resigning in 2003.[1]

Sega AM1 eventually became recognized for their technological advances in game development, such as being one of the first developers to implement 3D computer graphics.[2]


In 1983, Rikiya Nakagawa joined Sega as a junior programmer for arcade game titles. [3] Sega created AM1 later that year after deciding to switch game development divisions into designated "AM" teams. Nakagawa was made the manager of AM1 in 1993.

Beginning in 2000, Sega split their game development studios into nine autonomous companies. During this transition, AM1 was re-named Wow Entertainment. Wow was a primary developer for games on the Sega Dreamcast, also porting their earlier arcade titles from the Sega NAOMI arcade board, which they also created. In 2003, Wow merged with Overworks Ltd., and was renamed again, this time as Sega Wow. Shortly after the company's integration, Nakagawa resigned. [4]



  1. Nakagawa Leaves Sega Wow. IGN (December 17th, 2003).
  2. SEGA New President's Story: Rikita Natagawa. SoftBank Publishing. (August 2000. pp. 93–96. Archived from the original on September 29, 2019.).
  3. Sega Arcade Game Development Chief Resigns.
  4. Sega AM1.
veThe House of the Dead games
Main series The House of the Dead (Remake)2 (Remake)III4 (Special)Scarlet Dawn
Spin-offs Zombie RevengeThe Typing of the Dead (2Overkill)The Pinball of the DeadEnglish of the DeadEX slot machineThe House of the Dead: Overkill (Extended Cut)Loving DeadsDarts of the DeadScarlet Dawn (Battle GenesisTHE ATTRACTION)Reels
Prototypes The House of the Dead (arcade prototypeSega Saturn prototype)2 (Original Sin prototype)Scarlet Dawn (location test builds)
Compilations 2 & 3 Return
Mobile games MobileNightmareZombie Utsu: Flick of the DeadOverkill: The Lost Reels
Non-HOD games Vampire NightSega Golden GunSonic & Sega All-Stars Racing
Gameplay mechanics Bonus itemsBranching pathsCiviliansHealthWeak points
Developers SegaSega AM1NamcoForever EntertainmentMegaPixel StudioTA Publishing
Staff Takashi OdaRikiya NakagawaBenjamin AnseaumeZbigniew Dębicki
Other content Hiiro SumomoReferences in popular cultureUnused content