Sonic Runners Has Been Released
Sonic Runners has suddenly been released. However it wasn’t unintentional. According to SEGA’s support page this is a soft launch of the mobile game. Sonic Runners is currently not available in the US or Europe.
When will Sonic Runners be released in the US / Europe?
Sonic Runners is a new mobile game developed by the Sonic Team in Japan. We are soft-launching it in select countries to see how the game does and to work out any bugs. No decision has been made yet whether it will be released in the US or Europe. It will depend on our observations during the soft-launch phase which could take several months.
Source: SEGA