Released in January 2014, Sega's Sonic & All-Stars Racing Transformed has delighted fans of Mario Kart-style racers with a World Tour mode designed specifically for mobile and its awesome multiplayer implementation supporting up to four players simultaneously, both locally and online.
The official iOS port of Sonic & All-Stars Racing Transformed for consoles, the game debuted with a price tag of five bucks and has since seen several price changes in an effort to boost downloads.
As Sega continues to experiment with various monetization methods, they've now taken the freemium route by slashing Sonic & All-Stars Racing Transformed to zero bucks and throwing in a bunch of paid in-app upgrades...