G.I. Joe: Sigma 6 is a G.I. Joe franchise, based on the toyline launched in 2005 and continued up till 2007.

The Sigma 6 series served several purposes for Hasbro. First, it allowed them to depart from the classic 3 ¾-inch format of the A Real American Hero series. The Sigma 6 action figures stand at approximately 8 inches and have more articulation. Second, the new series offered them the chance to streamline the storyline and characters for a new younger audience. It is hoped that Sigma 6 would follow in the success Hasbro had with Transformers: Armada and their hope is a multimedia revival of G.I. Joe. To accomplish this task, much of the old continuity has been stripped away, leaving younger versions of icons from the past.

It was supported by: