On the Alert is a single-player 2D platformer and shooter game where players navigate through 20 levels, battling enemies across various locations using three distinct weapon types, each with unique properties and variations. In this game, the storyline revolves around a guardian of order who receives an anonymous tip about a gangster group occupying an abandoned building. Upon investigation, the guardian encounters armed resistance and must clear the building of enemies. It stands out with its old-school graphics, a variety of diverse locations, and intense, breathtaking battles that challenge players' reflexes and strategic thinking, offering a nostalgic yet engaging gameplay experience.