Aleste, released outside Japan as "Power Strike", is a popular shoot-em-up developed by Compile and released initially for the SEGA Master System in 1988. Later it was published for MSX2.
An evil virus will wipe out humanity, and of course, saving the world will be up to you and your ship. But the plot is not very important in this vertical scrolling shooter full of enemies and challenging end-of-level bosses. Technically speaking, the game is perfect, scrolling and animations are smooth, and the action is furious. This is not an easy game. If you die in the middle of the level, you will lose all your weapons, so beating the boss will be almost impossible.
Many consider Aleste one of the best games ever created for the SEGA 8-bit console. It was followed by an Aleste 2, released one year later for the MSX, and also a Power Strike II, released in 1993 for the Master System.