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Brain is a 1986 game by Coreland and Sega for the Sega System 1 arcade hardware.
It is a side-scrolling shoot-'em-up. During the first stage you play as a helicopter-like that fires bullets from a gun mounted on its top, and in the stages after that, you play as a jetpack-clad spaceman with a gun that fires in the direction the player is currently moving. Some enemies leave Power-Ups; Purple Items destroy all enemies on-screen whilst yellow items increase your firepower. Oxygen tanks refill your Air Meter. Touching walls and floors results in losing a life in the spaceship stages, but there is no penalty for Colliding with them in Stage 2 and onwards. To win the game, the player must collect a certain number of Floppy Disks dropped by the UFO and Alien enemies in stage 2 and onwards.