Scooby-Doo! Unmasked is an action-adventure platform game for the GameCube featuring Scooby-Doo as he battles enemies and gathers clues for Velma. Players can change Scooby's costumes, which provide unique abilities such as kung-fu skills and bat-like flight. Completing certain levels often requires these transformations. The game also includes a laugh track and offers exclusive minigames on the Nintendo DS version.
The player uses Scooby-Doo to take down enemies and collect clues for Velma. Scooby-Doo can change costumes which can give him different moves such as kung-fu and fly like a bat. Without using these costumes some levels may not be possible to finish. This is the third Scooby-Doo game to feature a laugh track. In the Nintendo DS game, there are a few minigames included to make use of its touchscreen.