Our Stallone-inspired hero has four fights to win before becoming champion boxer in this sports game. Cimbel Lin, Ted Matare, Jansen Sino and Fighter Bull must be dealt with in order, with fights getting tougher as you progress.The action is viewed in 3D, from behind your boxer and with a full view of your opponent. A health bar is provided for each player, going from green to red as hits are scored. When the strength goes down to zero, a punch will floor your opponent - either player can be seen hitting the floor when a knockout blow is struck. Three knockouts are required to win a fight.
Many elements of Rocky (original title) were copied from the arcade Punch-Out!!. Specifically Rocky's loading screen main character and protagonist - ZX Spectrum and MSX versions - who is equivalent to Punch-Out!!'s 1st opponent, Glass Joe. The last was almost literally copied from the respective arcade cabinet illustration. Rocky's last opponent picture, Fighter Bull, is also equivalent to another Punch-Out!!'s opponent, Bald Bull, copied too from the respective Arcade cabinet illustration.
The game was first titled Rocky but had to be withdrawn because of the similarity with the famous series of movies. Later it was renamed to Rocco and re-released.