The mainland Chinese release censors all mentions of the name "Shanghai" (where the opening battle takes place). Galloway's line "You guys made a mess at Shanghai" is edited to remove the last two words, while other uses of the city's name are bizarrely overdubbed with something that sounds like "Shanghaish."
The IMAX version of the film, released on DVD and Blu-ray as a "Big Screen Edition" exclusively at Wal-Mart, features at least an additional minute of footage. During the film, the screen resolution and aspect ratio occasionally changes to the larger (70mm) IMAX format for select shots (jumping back and forth between this and the standard aspect ratio in the middle of a scene). The scenes include a slightly extended version of the fight in the forest, with more shots of Decepticons exchanging fisticuffs with Optimus Prime, Sam reacting, etc. Two more sequences consist of footage of Devastator during his transformation in the desert and various assaults on the pyramid. Much of the IMAX footage consists of alternate takes as well.