From Sega Retro


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

Number of players: 1
Release Date RRP Code
Sega Mega Drive
$? 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

Source: In-game credits

Promotional material

EGM US 027.pdf

Print advert in

Electronic Gaming Monthly (US) #27: "October 1991" (1991-xx-xx)
also published in:

  • GamePro (US) 16-bit Video Gaming: "February 1992" (1992-xx-xx)[1]

Physical scans

Sega Retro Average 
Publication Score Source
68 №23, p112
41 №3, p30/31[2]Media:MegaTech UK 03.pdf
63 №7, p42[3]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

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Mega Drive
CRC32 44f4fa05
MD5 71a8c01301fe029f01f2f0b17f94d414
SHA-1 a68f3b9350a3a05850c17d157b56de88556cd26a
1MB 1991-11 Cartridge (US)


  1. File:16BitVideoGaming US.pdf, page 13
  2. File:MegaTech UK 03.pdf, page 30
  3. File:SegaPro UK 07.pdf, page 42