Styx

One of the best Decepticon prisons in the galaxy and it gets beaten by a computer program.

A small ice and snow-covered moon orbiting Charon, a vast gas giant, is home to the Decepticon penal colony called Styx. Of all such installations it is the harshest and most brutal. Prisoners sent to Styx have a short life-expectancy and may be better off for that. The penal colony is said to be impregnable.

Gutcruncher was stationed there for a time, before he was on Banzaitron's team. He was later almost deactivated by the Monstructor Six when they were stolen from Garrus-9 and reactivated by Jhiaxus.

Fiction

IDW comic continuity

Hot Rod impregnates the impregnable prison (get your mind out of the gutter) with a virus that lets him sneak in and free his former comrade, Dealer.

Although Dealer seemed appreciative, he failed to give Hot Rod a "Domo arigato". Spotlight: Hot Rod

The Decepticon battalion commander Gorelock was imprisoned there for giving aid to Overlord. Gorelock's prisoner clemency request

The AllSpark Almanac

Styx was a organic moon in the Decepticon Empire. Transformers Animated: The AllSpark Almanac II

Notes

• In Greek mythology, Styx was a river which the dead journeyed down on the way to Hades.