Sonic Racing Shift Up (ソニックレーシング SHIFT UP) is a mobile phone game released as part of the Sonic Cafe service offered by Sega.
Description
In this game, the player has to shift gears in a kart as quickly as possible - but get timing right at the same time. Shift data can be uploaded to and downloaded from a remote server so that it is possible to play against people all over Japan. The player can also use earned Rings to tune up their karts and make them faster.
Screenshots
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