Custodian is a single-player action, shooter, and platformer game in which players must defend energy bases from parasitic enemies attempting to drain their resources. In this game, set within a sci-fi universe, players navigate through four distinct area levels, utilizing a variety of weapons and power-ups to combat the threats. It stands out with its fast-paced arcade gameplay, vibrant chiptune music, and its status as the first release for the Atari Jaguar by Piko Interactive, offering a nostalgic yet engaging experience across multiple platforms including Atari ST/STE, antstream, Atari Jaguar, Jaguar, Game Boy Advance, and Amiga.