Styx

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

 :'Styx is a Decepticon penal colony in the Generation 1 continuity family.

A small ice and snow-covered moon orbiting 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".

Trivia

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