Sega AM4

From Sega Retro

Sega AM4
Founded: 1991
Defunct: 1999
Merged into: Sega Mechatronics (1999)

Sega Amusement Machine Research and Development Department #4, commonly known as Sega AM R&D #4 or Sega AM4, was a research and development division within Sega. The AM4 name was adopted in 1990 after the internal AM and CS teams were separated, and its attraction and medal game personnel broke off into the Sega AM5 and Sega AM6 units. It was previously known as R&D4.

Unlike Sega AM1, Sega AM2 and Sega AM3, Sega AM4 was responsible for the creation of arcade cabinet hardware, and thus outside of an advisory role had no influence in the development of video game software. During the development process, the three main AM divisions would typically first provide a 50% complete build of their titles for AM4 personnel to examine and base a cabinet off of.[1]

Though AM4 most often created cabinets to house the three software-focused AM divisions' produce, it would make projects of its own and with others too; their UFO Catcher and Print Club lines in particular became large successes for Sega and popularised their machine types in Japan. The division also collaborated with its former AM5 and 6 colleagues again on some occasions.

Ultimately, AM4 created the vast majority of arcade machines sold by Sega in the 1990s. Its credits remain inconsistent however, with it sometimes being credited and other times not, receiving less recognition than the three main AM divisions as a result.[1]

AM4 merged with AM6 in 1999, and continued its role as Sega Mechatronics.


Softography before AM4

World Derby BD



Multi-purpose arcade cabinets


System C2

  • (1995)

Model 1

  • (1992)

Model 2

  • (1994)
  • (1995)
  • (1995)
  • (1997)
  • (1997)

Sega Titan Video

  • (1994)
  • (1995)

Model 3

  • (1997)
  • (1998)
  • (1998)
  • (1998)


  • (1998)

Large attraction

  • (1994)

Royal Ascot BD

Western Dream BD

X Board

Bingo Party BD/M1

Castle Coaster BD


C-GAL/Sega Titan Video


Dream Catcher BD



Sega System C

Sega System 16B

Y Board

Sega Titan Video

Sega H1 Board


Multi-purpose arcade cabinets

Magazine articles

Main article: Sega AM4/Magazine articles.


Domestic Sega studios
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20
CSK Sega Sammy Holdings
Sega Enterprises, Ltd. Sega Corporation Sega Games & Interactive
Sega R&D 1 Sega AM1 R&D #1 WOW Entertainment Sega WOW Sega AM1
Studio 128 Sega R&D 8 Sega AM2 R&D #2 AM2 of CRI Sega-AM2 Sega AM2
Sega AM11 R&D #4 Amusement Vision New Entertainment Sega CS1
Ryu ga Gotoku Studio
DigitalRex AM Plus
Sega AM3 R&D #3 Hitmaker Sega AM3
AM Annex R&D #5 Sega Rosso
Sega AM4 Sega Mechatro Product R&D
N. Pro. R&D
Sega AM5 Mirai R&D Family Entertainment
Sega AM6
Sega R&D 2 Sega CS Sega CS1 R&D #6 Smilebit Sega Sports Design
Megasoft Team Andromeda
Sega PC Online R&D
Sega CS2 R&D #7 Overworks GE2 Sega CS3
Sonic Team
Sega CS3 R&D #8 GE1 Sega CS2
R&D #9 United Game Artists
Sega Sound Team
Sega Digital Media Wave Master Wave Master (label)
Mobile Content R&D Sega Networks
Visual Entertainment Marza Animation Planet