Sonic Battle Cards – Fight opponents using your main character, as well as various battle cards that you collect from defeating your other opponents. Your beginning character in the game is Shadow. Shadow is given two battle cards by Sonic, who then shows Shadow how to battle using the cards. You can either choose to attack with Shadow, or you can use one of the battle cards for various effects. All actions in the game are controlled with the mouse. This game is only a test version of the full game, which was apparently never completed.