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Starline Base Sigma (formerly Egg Base Sigma) was a Eggman base that was taken over by Dr. Starline for his purposes. It was described by Dr. Starline as a modest industrial site by the Eggman Empire's standards. The Badniks guarding the base included Egg Pawns and Moto Bugs. (Bad Guys: #1)

Bad Guys

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Egg Base is part of a series of Eggbases named after Greek letters. In the games and IDW Series, Dr. Eggman also had a penchant for nameing the E-series as greek letters as well.