
Casper is a handheld action-adventure game featuring the friendly ghost of the same name. It is one of the few video games where Casper has the ability to pass through walls, but only those within each specific level. The objective is to assist Casper as he navigates through five levels, using different transformations and items to help the zombie doctor gather flasks containing the formula that can cure him. Each level also includes six children to rescue, although rescuing them is not required to complete the level.
The Ghostly Trio have transformed every adult in town into zombies, leaving the children frightened and vulnerable to their control. The manor's former Schoolmistress urges them to summon Dr. James Harvey to put an end to the threat, but he too becomes a zombie, doomed to walk only a step ahead of them.