Space Fury (J:スペースフューリー) a multi-directional shooter arcade game created by Sega released on June 17, 1981. The player controls a spaceship battling alien spacecraft. Like other early similar arcade games, it is controlled by four buttons: rotate left, rotate right, thrust and fire. The game was particularly unique in that the player could choose different upgrades for the first three levels. One upgrade would allow the player to shoot in a three-way pattern, another would allow the player to fire forward and backwards, and the third would allow all the firepower to be concentrated in the front.
At the conclusion of the following round, the player would then pick up another shell, although multiple ones could not be used together. The different firing patterns made each round seem slightly different. Between rounds and during the attract mode, the alien commander would taunt the player through the use of synthesized speech. The spacecraft would initially appear separated and would not be able to shoot if some of the pieces were annihilated before they converged, but would try to ram the player's ship at an increasingly faster velocity. The game continues indefinitely but stops calculating the score after the completion of level four.
Source: Wikipedia, "Space Fury," available under the CC-BY-SA License.