

Comet Cup, Illusion Cup, Dream Cup and Master Cup must be unlocked. Windmill Cup, Pirate Cup, Samba Cup and Retro Cup are already accessible to the player at the start of the game. These are grouped in 8 cups, each consisting of 5 stages. The conditions for each unlockable character to be unlocked are described below. There are 12 racers in each race, including the player himself. Of the 38 playable characters, 18 are new and 20 are veterans. The characters are the same for all systems and are all from popular SEGA titles. The game features 38 playable characters in total, of which 21 are starter and 17 are unlockable. There are no major differences between the consoles, with the exclusion of graphics, speed and sound effects. The game include various modes of play including rand Prix, single race, Time attack and the new Story Mode. Moreover, characters are unlocked in a different way than before. Depending on the amount of rings collected, the player's vehicle will upgrade, in statistics and appearance that is, in the middle of the race. In each race, however, the vehicle returns to its normal condition. Experience points also return. The racetracks are now filled with rings rings are also items. This mechanic can only be activated once per lap in certain parts of the stage, where the road is long and wide.

A new inclusion to the game is a mechanic in which the player can press a button to activate a super boost, similarly to Gravity Dive from Sonic Riders: Zero Gravity. Characters have now 3 vehicles, with the exception of a few. New items have been included, as well as multiple new characters and stages. The races are faster, the stages are much longer and can change at certain segments during each lap. In terms of graphics and mechanics, the game is very similar to its prequel as it uses the same engine, with a few differences. When received enough damage by attacks or bumps, it will slow down and emit smoke and fire. This addition makes the stages more diverse and give more flexibility to the player's actions. When the racer approaches a segment of transformation, the player's stats glow and make a sound to signify that the player must press that button at that specific moment to transform. For example, the stages have various shortcuts, some of which require boat form, others requiring plane form etc. A major difference, however, is that in this game, the player decides the time when the vehicle transforms as well as the type of transformation, by pressing a button on the controller. The game brings back the three different modes of racing these are car, boat and plane. The player chooses a racer, a vehicle and a stage and race along with 11 other racers. Like every other racing game, Sonic and SEGA Superstars Racing: Speed Showdown is a racing game which follows the footsteps of its predecessor.
