THIS GAME IS GREAT ITS ONE OF MY FAVOURITE SONIC GAMES I CAN PLAY WITH MY BROTHER 2 PLAYERS MODE OR I CAN GET REALLY REALLY HARD ACHIEVMENTS BUT the death egg robot is impossible with knuckles and the debug mod when you use it or close it it will open the puase menu and that gives me an ad and always when you log in he will ask you do you want to buy no ads version