Sub-Terrania is a 1994 multidirectional shooter developed by Danish studio Zyrinx and published by Sega for the Mega Drive/Genesis. The game takes place in the future, where a deep-space mining colony has been invaded by an unknown alien race. The player assumes the role of a lone pilot who must defeat the alien forces and rescue the trapped miners. During the course of the game, the player controls a rotatable craft with thrusters that is constantly subject to gravity and the craft's inertia.