Lisbon - Manchester United winger Cristiano Ronaldo is used to dodging soccer players.

In Underworld Football, a new game designed for mobile phones and unveiled on Sunday, he'll be playing against monsters to save the sport from extinction.

In the game, an age of darkness is threatening soccer and the winger must use his skills to lead a team of humans against hordes of scary creatures, including ogres, demons, ice trolls and skeletons, to rescue the sport from doom.

Created by Portuguese developer YDreams Entertainment, Underworld Football is available for several mobile phone models and can be downloaded online.