In comparison to the previous RegionGame and HeiseiGame suits, the IrisuGame more closely resembles the ShodaiGame. It is generally far more fierce in appearance. The suit's eyes are less circular than the previous Heisei suits, and the extensions on his arms are no longer present. The plates on his shell are longer, articulated and more irregular in shape, and its legs and arms are more muscular. There are points on the suit which are comprised of softer fabrics, much like the RegionGame suit, which allow for the Iris and Gyaos suits to damage it. The IrisuGame also has a "mane" of spikes on the top of its neck, which are a dark blue color.
A separate suit was used for the Nightmare Gamera (トラウマガメラ?, lit. Trauma Gamera) that appears in Torauma GameraAyana's nightmares. This version of Gamera was actually portrayed using the Gamera suit from the previous film only modified, and was portrayed by Akira Ohashi.