In Metro City, the military decide to test their new weapon, Mecha-Congar, on the giant mantis Preytor, who was attacking the city.
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After defeating two Ultra V robots at "Tsunopolis", the lead monster is abducted by a UFO that takes it back to the mothership.
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The game is set in the aftermath of an alien invasion of Earth where their hazardous fuels have spawned giant monsters that battle one another in city environments.
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The plot is set in the 1950s where a fleet of alien flying saucer warships invade the Earth, causing massive damage.
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