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Aleste (アレスタ) is a shoot-'em-up by Compile released in 1988 for the MSX computer in Japan. It is the first game in Compile's Aleste series of shoot-'em-ups. Sega ported the game to the Sega Master System and released it internationally, calling it Power Strike outside Japan.
In North America Power Strike was the first in the "special edition" range of Master System games. These could not be found on store shelves, and had to be ordered from Sega themselves.
While the MSX game received two sequels, Compile would take the franchise further on other platforms through 1994. Most Aleste games released outside Japan would use the Power Strike moniker, with a few exceptions (MUSHA, Robo Aleste, the SNES game Space Megaforce). The Master System game was followed by Power Strike II in 1993; this is an outlier in the series and only released in Europe.