Gaist Crusher (ガイストクラッシャー, Gaisutokurasshā) is an action video game developed by Treasure and published by Capcom.

[1][2] 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, and features the original story from the first game as well as another "God" story, refined mechanics and more enemies.

It is also the final video game developed by Treasure before the company went on hiatus shortly after its release.

At the end of the map, a larger Gaist will appear, which the player must defeat to complete a mission.

A mysterious metallic ore discovered 50,000 meters (160,000 feet) beneath the ground 15 years from the main story.

Although appeared to be metallic in nature, Gaimetals (ガイメタル) are capable of rapid crystallization, and it can also alters a genetic make-up of an organism.

Named after motifs from mythical cultures and legends, each Gaist differ in elemental attributes, appearance and abilities.

When a Gaist's certain body part cracks, and crystals sprout out of it, a Crush Chance (クラッシュチャンス) occur, giving the Gaist Crushers the opportunity to destroy its "crush metal" to defeat and restore them into their Gaimetal form.

However, it requires inserting a Gaimetal on the Gai Phone, and the user must have an "aura" that can release enough Gaivolts (ガイ・ボルト) to activate it.

The goal was to market the game to elementary school age boys primarily using partnerships with Shueisha, Bandai and Pierrot including manga, toys and an anime.