John Carpenter has made a lot of great – or at least very good – movies over his career, and most of them have never had sequels, or at least sequels he was actually involved in (I can't blame him for the abundance of Halloween movies that came after his, for example).
An exception is his sequel to "Escape from New York," in which war hero gone bad Snake Plissken (the always great, and often Carpenter-collaborator Kurt Russell) was forced to enter Manhattan – now a maximum-security prison – to rescue the kidnapped President of the United States. It was a ripping yarn, despite the overall silliness of turning Manhattan into a prison.