Alpha Mission is a vertically scrolling shooter developed by SNK and released for the NES in 1987. Players control a spacecraft as they battle through waves of enemy ships and bosses to save the galaxy from the evil Krin.The gameplay revolves around shooting enemies, collecting power-ups, and dodging obstacles as players progress through seven challenging levels. Players can also upgrade their ship with new weapons and defenses to increase their chances of success.Alpha Mission received mixed reviews upon its release, with critics praising its graphics and sound design but criticizing its repetitive gameplay and lack of innovation. Despite this, it remains a classic example of the shoot 'em up genre on the NES.For more information about Alpha Mission, you can visit MobyGames.