Kishin Taisen Gigantic Formula  

GF, gigantic formula, 机神大战 巨型方程式, 機神大戦 ギガンティック・フォーミュラ, Apo Mekhanes Theos Gigantic Formula, Mechanical Divine War Gigantic Formula, War Gods Battle: Gigantic Formula

In 2035 AD, ancient giant idols' heads were discovered worldwide. With these twelve stones, humanity barely survived an extinction threat known as "Equatorial Winter." However, to protect themselves from harm, they constructed massive armor suits for their bodies and made humans fight each other due to the statues' demand.