Mind Zero, stylized MIND≒0, (Japanese: マインド/ゼロ, Hepburn: Maindo/Zero) is a dungeon crawler role-playing video game developed for the PlayStation Vita portable video game console. It was developed jointly by Acquire and Class of Heroes developer ZeroDiv, and published by GungHo Online Entertainment. It was released in Japan on August 1, 2013, and in May 2014 in Europe and North America by Aksys Games.
The game takes place in two different "worlds"; the real world, and a "crazy spiritual world". The real world aspect of the game is set in Japan, in the regions Akihabara, Yokohama, Amamiya and Nippori. Specifically, the game takes place in the Saitama Prefecture. The story is simple, revolving around a high school student, Kei Takanashi, and a group of other high school students who stumble into the outer realm, and begin battling other MINDS and MIND Users to help protect and save people.