Rovio's most successful game has to be Angry Birds . There have been spin-offs – Seasons, Star Wars, Space, Rio – but the original always remains a firm favourite. Angry Birds Friends tries to recreate some of the magic by putting it into a multi- player tournament mode. The game eases you in with a tutorial tournament. Catapult a bird at a pig and hope for the best. You've also got extra weapons and power-ups that turn your bird from a flying projectile into a pig-seeking missile. Otherwise, you can shake the earth and dislodge your pig opponents. These can be bought with bird coins that you earn or buy. Then you play as normal, but your scores are pitted against those of your friends in weekly tournaments. These tournaments have new levels every week and you compete for gold, silver or bronze. It's standard Angry Birds fare but it will give addicts something a little extra to keep them going.