Spelunker II - 23 no Kagi (c) 1986 Broderbund.

>>> TECHNICAL DETAILS
---------------------
Irem M-62 system hardware
Main CPU : Z80 (@ 4 Mhz)
Sound CPU : M6803 (@ 894.886 Khz)
Sound Chips : (2x) AY8910 (@ 894.886 Khz), (2x) MSM5205 (@ 384 Khz)
Screen orientation : Horizontal
Video resolution : 384 x 256 pixels
Screen refresh : 55.00 Hz
Palette colors : 768
Players : 2
Control : 8-way joystick
Buttons : 2

>>> TRIVIA
----------
Released in October 1986.
The subtitle of this game translates from Japanese as '23 Keys'.
Licensed to Irem for manufacture and distribution.

>>> GAME SERIES
---------------
1. Spelunker (1986)
2. Spelunker II - 23 no Kagi (1986)

>>> DESIGNERS / PROGRAMMERS / STAFF
-------------------------------------
Designed & programmed by : Tim Martin

>>> GAME PORTS TO OTHER SYSTEMS
-------------------------------
* Consoles :
Nintendo NES [Unreleased Prototype]

>>> OTHER GAME RESOURCES
---------------------
Game's rom.