From Sega Retro


Caliber50 title.png
Publisher: Mentrix Software
System(s): Sega Mega Drive
ROM size: 1MB
Sound driver: Visco/Kazuo Okabayashi
Genre: Shoot-'em-Up

Number of players: 1
Release Date RRP Code
Sega Mega Drive
1991 $? T-58026

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Caliber.50 is a top-down run and gun video game originally released in arcades (as Cal.50) before being brought to the Sega Mega Drive in 1991. The Mega Drive version was only released in North America, although Visco had plans at one stage to release a Japanese version.


The Mega Drive version is severely watered down from the arcade original, not just in terms of graphics and sound, but also gameplay, as the controls need to be mapped to three buttons. This means unlike the arcade original B takes the roll of shooting and throwing grenades, A rotates left and C rotates right. The arcade cabinet used special joysticks which could be spun around to rotate the player. To compensate, there are fewer enemies on screen, and the player is given a life bar.

Production credits

Producer: Tetsuo Akiyama
Original Works: Seta Ltd.
Story: David Owen Miller
Director: Yasuhisa Itoi, Don Gabacho, R. Lopez
Game Design: Masaharu Ohno
System Programming: Masaharu Ohno
Game Programming: Takanori Kohno
Character and Graphic Design: Kuma San, Do. Kodama, Taketoshi Furuya, Makoto Ida
Music Composition and Arrangement: Kenji Yamasaki, Kazuo Okabayashi
Sound Effects: Masaharu Ohno, Kazuo Okabayashi
Game Box and Manual Design: Creative Juices
Proudly Presented by: Mentrix Software, Inc.

Physical scans

Sega Retro Average 
Publication Score Source
68 №23, p112
41 №3, p30/31Media:MegaTech UK 03.pdf[1]Media:MegaTech UK 03.pdf
63 №7, p42Media:SegaPro UK 07.pdf[2]Media:SegaPro UK 07.pdf
33 №18, p64
Sega Mega Drive
Based on
4 reviews

Mega Drive, US
Caliber50 MD US Box.jpg
Caliber50 MD US Cart.jpg


  1. File:MegaTech UK 03.pdf, page 30
  2. File:SegaPro UK 07.pdf, page 42