AM6 had been an unusual group within Sega, being split into Team Aquila (Victory Goal) and Team Andromeda (Panzer Dragoon), as well as smaller task forces such as G9 Team. With Smilebit, all of these groups were finally brought together under one banner (save for staff who moved to United Game Artists), and Smilebit became the de facto studio for sports games (although it also diversified into other genres).
|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|