Casper and The Ghostly Trio is a 3D platform game starring Casper the Friendly Ghost. Casper's uncles Fatso, Stinkie and Stretch have kidnapped his friend Wendy the Good Little Witch. They plan on misusing her magic to rule over Ghostland.

In the game the player takes control of Casper and explores the six levels in search of Wendy. Gameplay includes platforming as well as collecting four key in each map. Sometimes objects like crates have to be moved to reach certain areas.

Casper also has the ability to shoot at various ghostly enemies and additional health (blue hearts) can be collected. Between the stages a bonus level has to be played from a side view perspectivem where the player collects gems while staying ahead of danger.