Scooby-Doo! Mystery of the Fun Park Phantom

Mystery of the Fun Park Phantom is a 1999 mystery computer game developed by Engineering Animation, Inc. (EAI) and published by SouthPeak Interactive. The game was released for Microsoft Windows and was the first commercial Scooby-Doo game for the Windows operating system.

The "Mystery Inc." gang find themselves stranded near an old farmhouse adjacent to an apparently abandoned amusement park. Approaching the farmhouse for help with the Mystery Machine (their van), the gang learns that the Gobs, the residents of the home, own the adjacent park, Gobs O' Fun. However, the park is being haunted by a phantom, scaring customers away. Without any customers, the Gobs are on the brink of bankruptcy, which will force them to sell the park. The gang agrees to help the Gobs find the culprit in exchange for help getting their van repaired.

(Source of Description - Wikipedia; 'Scooby-Doo! Mystery of the Fun Park Phantom')