Gaist Crusher (ガイストクラッシャー, Gaisutokurasshā) is a Nintendo 3DS action video game developed by Treasure and published by Capcom. It was released on December 5, 2013 in Japan, which launched as a part of a cross-media franchise including manga adaptations in Shueisha magazines and an anime television adaptation by Pierrot.
A sequel, entitled Gaist Crusher God (ガイストクラッシャーゴッド, Gaisutokurasshā Goddo), was released in Japan on September 4, 2014, featuring the original story with an extra chapter called the "God" story, with refined mechanics and more enemies.
In the year 2047, mankind discovered "Gaimetal", a rare metal ore which possesses a huge amount of energy, and mining for these strange metal begins all over the world. However, in 2064, humankind were constantly attacked by Gaist, a race of metallic creatures whose bodies were encrusted with Gaimetal, thus forming the GCG (also known as "Gaist Crusher Garrison"), an organization tasked with dealing against the Gaist. In 2075, the GCG send out mankind's line of defense: the Gaist Crushers, humans who can wear a special Gaimetal armor called "Gaist Gear", and battle the Gaist, as well as the threat opposed by a mysterious organization called "Erasers".