Mahjong Chinmoku no Hentai © 1990 Nichibutsu.
A mahjong game with a war theme and random bonus items. The 'manzu' suit of tiles are in English rather than Chinese.
Main CPU : Zilog Z80 (@ 5 Mhz)
Sound Chips : YM3812 (@ 2.5 Mhz), DAC
Screen orientation : Horizontal
Video resolution : 512 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 256
Player : 2
Released in May 1990.
The title of this game translates from Japanese as 'Mahjong Silent Formation'.
This game parodies the Kawaguchi Kaichi anime/manga 'silent service' (Player character doesn't have a submarine but controls a Gunship!).
Game's ROM.