G.I. Joe: Operation Ultra is a cancelled action game that was planned by Radical Entertainment (mostly known for their The Simpsons: Road Rage, The Simpsons: Hit & Run, Crash of the Titans, Prototype series) and Hasbro around 2002, to be developed for Playstation 2, Xbox and GameCube. As you probably assume it was meant to be a tie-in for the popular G.I. Joe franchise, conceived when Hasbro published a new G.I. Joe vs. Cobra toy line around the same time. While the game was never officially announced, in 2018 a former developer shared a few details and some photos from their design document:
“One day I’ll be able to discuss how in 2002, Hasbro and Radical Entertainment secretly concocted a mission-based G.I. Joe video game. Dubbed G.I. Joe: Operation Ultra, the game broke down into sixteen separate missions of 4 acts each. Developed for 6th generation consoles (XBox, PS2, and GameCube), Hasbro went quite far in the design process – to the extent where they assigned mapping for the consoles’ controllers.”
As far as we know, Radical Entertainment did not fully start development on the game and the project was canned before any prototype was made.