SegaDevs

From Sega Retro

Sega Development Studios
Japan R&D; 1984-1990
Consumer R&D | Amusement Machine R&D | Annex R&D (Sega AM2)
Japan, 1990 - 1999
Amusement Machine R&D Consumer R&D
Sega AM1 | Sega AM2 | Sega AM3 | Sega AM4 | Sega AM5 | Sega AM6 | Sega AM11 | AM Annex/AM12 Sega CS1 (Team Andromeda | Team Aquila | Sega CS2 | Sega CS3 (Sonic Team) | Sega CS4 | PC Software R&D | Digital Media Unit
Japan; 1999-2004
WOW Entertainment/Sega WOW | Sega AM2 | Hitmaker | Amusement Vision | Sega Rosso | Smilebit | Overworks | Sonic Team | United Game Artists | Wave Master | Sega Mechatronics | Sega Mirai R&D | Digital Rex | Consumer R&D | Amusement Machine R&D
Japan, 2004 - 2008
Amusement Machine R&D Consumer R&D
Sega AM1 | Sega AM2 | Sega AM3 | Sega AM Product | Sega AM Plus | Family Entertainment R&D Sega GE1 (Sonic Team) | Sega GE2 | | Sega NE | Mobile R&D
Japan, 2008 - current
Amusement Machine R&D Consumer R&D
Sega AM1 | Sega AM2 | Sega AM Product | Mobile R&D formed 2010 (Sega Networks) | N. Pro. R&D formed 2013 Sega CS1 (Ryu ga Gotoku Studio) | Sega CS2 (Sonic Team) | Sega CS3 (Online R&D formed 2010) | Mobile R&D (Sega Networks)
Japan, 2015-current
Sega Interactive Sega Games
Sega AM1 | Sega AM2 | Sega AM Product Sega CS1 (Ryu ga Gotoku Studio) | Sega CS2 (Sonic Team) | Sega CS3 | (Sega Networks)
North America
Three Rings Design | Relic Entertainment | Demiurge Studios

Defunct: Gremlin Industries/Sega Electronics | Sega Technical Institute | Sega Midwest Studio | Sega Interactive | SegaSoft | Sonic Team USA/Sega Studios USA

Europe
The Creative Assembly | Sports Interactive | Hardlight | Amplitude Studios

Defunct: No Cliché | Sega Racing Studio

Asia
Sega Studios China formed 2002

Rough idea of what's going on - fix it plz