Space Invaders Part Four (c) 19??.

>>> TECHNICAL DETAILS
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Main CPU : 8080 (@ 1.9968 Mhz)
Sound Chips : SN76477 (@ 1.9968 Mhz)
Screen orientation : Vertical
Video resolution : 224 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 2
Players : 2
Control : 2-way joystick
Buttons : 1

>>> TRIVIA
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Original products :
Space Invaders (Taito Corp.)
T.T Space Invaders (Taito Corp.)
Licensed products :
Space Invaders [Upright model] (Midway)
Space Invaders [Cocktail Table model] (Midway)
Bootlegs/Hacks list :
Space Invaders (Logitec Co., Ltd.)
Space Invaders (Model Racing)
Space Invaders Part Four
Super Invaders (EMAG corp.)
Super Invaders (Zenitone Microsec)
Super Earth Invasion (Competitive Video)
Alien Invasion Part II
Space War Part Three
Clones list :
IPM Invader (Irem)
Cosmic Monsters [Upright model] (Universal)
Cosmic Monsters [Cocktail Table model] (Universal)
Cosmic Monsters 2 (Universal)
Space Attack [Upright model] (Video Games GMBH)
Space Attack [Cocktail Table model] (Sega)
Space Attack [Upright model] (Sega)
Space Attack [Counter model] (Video Games GMBH)
Space Attack [Cocktail Table model] (Video Games GMBH)
Space Attack II (Zenitone Microsec)
Jatre Specter (Jatre)
Space War (Sanritsu)
Space King (Leijac)
Space Intruder (Shoei)

>>> GAME UPDATES
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1) The saucers that run across the top of the screen shoot back at you when they have a clear shot.
2) Some invaders split into two invaders on either side of the original, giving you more invaders to shoot.
3) When you finish a rack, the following gets printed on the screen: 'Well Done Earthing, this time you win. Now do battle with our super forces.'.
- SCORING -
Large Invader : 10 points
Medium Invader : 20 points
Small Invader : 30 points
UFO : 50 to 300 points

>>> OTHER GAME RESOURCES
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Game's rom.