Devil's Due G.I. Joe ves Transformers continuity
Many years after the Ark had crashed on Earth, Cobra discovered it and its dormant crew. The Transformers were reprogrammed to be under Cobra's control and given new alternate modes, with Ironhide, Ratchet and Optimus Prime now turning into H.I.S.S. tanks. Along with Starscream, Skywarp and Thundercracker, the three Autobots were forced to attack a peace summit in Washington, D.C. The reprogrammed Transformers were eventually freed thanks to Wheeljack, and despite Cobra's efforts to regain control of Ironhide, the Autobot got away when Ratchet ripped their control cables out of his head. Along with Jazz and Mirage, the two then joined Optimus Prime in fighting back against both the freed Decepticons and Cobra. During the battle, Ironhide didn't do much but liken the density of Decepticons on Cobra Island to that of astro ticks on Ravage's behind.
After defeating the Decepticons on Earth, the Autobots returned to Cybertron, which Shockwave had conquered in their absence. With the Autobots reduced to a small resistance band, Ironhide helped Optimus Prime and Jazz steal a pile of energon cubes from the Decepticons. He was understandably surprised when his two friends suddenly disappeared in a flash of light.
Much later, when Optimus Prime was captured by Serpent O.R., Ironhide joined a team of Autobots who were waiting for a chance to free him. When Serpent O.R.'s hostages were freed and reinforcements arrived from Earth, the team attacked and ultimately defeated the Decepticon army.