A Giant Gamma (巨大眼魔 Kyodai Ganma) is a form which can be accessed when an Empowered Gamma absorbs either a Parka Ghost before a catches it in their Ghost Driver, a large construct, or other Gammas, causing them to change into a bigger and more powerful form based on their unique motifs. In order for Kamen Rider Ghost to free the Parka Ghost so he can create a Ghost Eyecon from it, he must first defeat the Giant Gamma to separate both the Empowered Gamma and the Parka Ghost that the monster has absorbed. The Iguana Ghostriker is most useful at dealing with Giant Gamma.