3D Ghost Attack! is a single-player action shooter game in which players use a photobeam to explore a haunted mansion and uncover its mysteries. In this game, the storyline revolves around investigating a supposedly haunted mansion, with the player armed with a photobeam to capture evidence of supernatural activity amid flashes of light and ghostly appearances. It stands out with its use of 3-D gameplay utilizing red/blue anaglyph glasses, and its development history includes multiple prototypes, offering a unique retro experience on the Atari 2600 platform.