Scooby-Doo: Mystery Mayhem takes you through five levels of clue-finding and ghost-grabbing. Along the way you will meet up with the rest of the gang as Daphne, Fred and Velma help you put the clues together and solve the various mysteries.
The first episode puts Shaggy and Scooby in a local library where ghosts have been let loose and the ancient book, the Tome of Doom, is missing. When you start this episode, you have no way of defending yourself, so every time you turn around, another ghost is knocking down your Cool Meter (basically your health). Thankfully, Scooby Snacks (to make you brave again) are frequent enough in this episode to keep you going until you find the book and learn how to use it against the things that go bump in the night.
The other four episodes will take you to a movie set, a western-themed amusement park, some bayous and a high-tech company. Each episode is full of different creatures, costumes and clues that will help you figure out the mystery that spreads across the entire game.
In each episode there are various clues and sandwich parts scattered about. The clues will help you figure out what is really going on behind the scenes. Though you don't actually need to find all of the clues, they will unlock concept art. If you find all of the sandwich parts in an episode, then one of the five mini-games will be displayed on the Main Menu.
These games include: Trap the Fake Ghost, Monster Frenzy, Mine Cart Ride, Mini Trail Bike and Spooky Science. Though I have yet to unlock them all, the ones I have played have kept me in front of my PS2 for awhile.