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Antichthon before its mutation.

Antichthon was a planet in the Gradian Star System(Relationship with Metalion Star System is unknown). It used to be the protectorate of the Gradian Empire until 6644, when the Bacterians infected Antichthon's mother computer and turned it into a brain with three eyes. Vic Viper then destroyed the infected mother computer, destroying Antichthon in the process.


  • In the SNES ending of Gradius III and the beginning of the fourth level of Gradius V, a green planet appears. This could either be a rebuilt Antichthon or another green planet.

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