Space Fortress (c) 1981 Century Electronics.

>>> TECHNICAL DETAILS
---------------------
Main CPU : S2650 (@ 894.886 Khz)
Sound CPU : S2650 (@ 894.886 Khz)
Sound Chips : (2x) DAC (@ 894.886 Khz), TMS5110 (@ 640 Khz)
Screen orientation : Vertical
Video resolution : 248 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 16
Players : 2
Control : 2-way joystick
Buttons : 2

>>> GAME PORTS TO OTHER SYSTEMS
-------------------------------
* Consoles :
Bally Astrocade

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