Founded: 1992-09-28 (as Emarg)
Nex Entertainment (ネクスエンタテインメント) is a game development studio founded in 1992 primarily as Emarg. They developed games under contract for various companies, such as Sega, Takara, Capcom, and Namco. They changed name to Nextech (ネクステック) by March 1994, around the time they purchased Gau Entertainment. In August 1997, Sega acquired the studio as a wholly-owned subsidiary, though they continued to contract to other companies. They took their current name in July 2005, and Sega spun them out back to independence in November.
|Sega Development Studios|
|Japan R&D; 1982-1983|
|Sega Research and Development|
|Japan R&D; 1984-1988|
|Japan R&D; 1988 - 1990|
| Sega R&DD1 | Sega R&DD2 | Sega R&DD3 | Sega R&DD4 | Sega R&DD5 | R&DD6 | Sega R&DD7 | Sega R&DD8|
|Japan AM; 1990 - 2000-ish|
|"Arcade" R&D||"Consumer" R&D|
|Sega AM1 | Sega AM2 | Sega AM3 | Sega AM4 | Sega AM5||| Sega AM9 | Sega AM10? | Sega AM11|
|Japan AM; 2000-ish - 2004-ish|
|WOW Entertainment | Sega AM2 | Hitmaker | Amusement Vision | Sega Rosso | Smilebit | Overworks | Sonic Team | United Game Artists | Sega Mechatronics|
|Japan; 2004 onwards(?)|
|Sega WOW | Sega AM2 | Sonic Team | Sega Sports Design | Ryu ga Gotoku Studio | AM Ishoku Team
First CS R&D | Second CS R&D | Third CS R&D
|Japan non-AM, demerged, and defunct|
|Puyo Puyo Sega | Sega Networks | ???
Demerged: Sonic! Software Planning | Nextech | SIMS | ???
|Three Rings Design | ???|
|The Creative Assembly | Sports Interactive | Hardlight | Relic Entertainment|
|Sega of China|
|Sega Away Team|