The Secret Files contains Jazz Jackrabbit 2 and an additional separate episode. It features nine new levels containing new textures, and enables the player to control a third character, Lori. In almost each level there are alternate routes that the player can take.
If players complete the nine levels they may try their luck in twenty other levels that were created by fans of the game, including the single-player level, "A sting in your tail!". Like the base game, this edition includes JCS, the Jazz Creation Station, where gamers have the opportunity to build their own levels.
Jazz Jackrabbit 2: The Secret Files was originally planned to be called Diamond Edition (this is why the title screen shows Jazz carrying a diamond). Another last-minute change was that Lori was made into Spaz's sister instead of his girlfriend.
Jazz 2 Online (The only 'true' site focusing on Jazz Jackrabbit 2. From this site, you can read the latest news on the Jazz front, download levels created by Jazz fans and even entire episodes, and more.)