They then move on to Battle Machine, a famous race organization, where players discover the individual differences between events, along with rules, penalties, and other important information. After dominating the competition, Ryan is rewarded with a new drag vehicle—Either a sixth-generation Honda Civic or a ChevroletCobalt SS. Afterwards, he proceeds to finish other events in the Battle Machine series, and eventually is invited to Showdown Chicago. Before continuing, however, the player is introduced to the Race Kings: Ray Kriegerwho is the Grip King, Karol Monroe the Drag King (Drag Queen technically and respectively, since she is a girl),Nate Denver the Speed King, and Aki Kimura, the Drift King, all of whom drive heavily tuned vehicles and aspire also as racing champions.
Eventually, the player arrives at the next event. Showdown Chicago stands as the checkpoint for advancing further towards becoming the Showdown King, and thus is promoted by Super Promotion, which is acknowledged as the top organization in the world. After finishing several events, Ryo arrives once again, taking notice to Ryan's vehicle, and spectating. Once Ryan wins again, Ryo announces that he "should just stop and go home." He then moves forward into his career.
The next event is React Team Sessions, where Speed Challenges (essentially, the sprint events within thegame) are introduced, and the competition starts introducing teams, such as Ryo's team Apex Glide, alongside others: Ray's team Grip Runners, Karol's team Aftermix, Nate's team Boxcut, and Aki's teamTougeUnion. This affects gameplay elements and difficulty very drastically. At the end of the first event, Ryan wins a new drift car, which is either a fourth-generation Pontiac GTO or an Infiniti G35. After finishing the series, Ryan then moves onward to the next event Showdown: Autopolis, and soon starts accepting invites to the kings' race organizations, where he must challenge them before he can attempt to dethrone Ryo.
After Autopolis, Ryan is finally accepted to the premiere event of Super Promotion, which proves to be one of the single-hardest competitions in the world and in the ProStreet career. The end of the first event rewards him with a Nissan Skyline GT-R or a Dodge Viper SRT10, both tuned very highly for speed challenges. Throughout the remainder of Super Promotion, the teams try to eliminate him, even going as far as to purposely wreck him in races. Nonetheless, Ryan destroys the series, proceeding into the final showdown, Showdown: Autobahnring in Germany.
After the final showdown, Ryan begins his overtake on the current champions and their events. Ray stands in G Effect, the Grip Series, Karol in Rogue Speed, the Drag Series, Nate in Nitrocide, the Speed Challenge Series, and finally Aki in NoiseBomb, the Drift Series. At the end of every event, he personally challenges each one of them, and, once victorious, receives the pink slip for their cars.
After taking down all four of them, Ryo demands a final challenge against him in all race types. The wager is his Evolution X and the title of Showdown King, or Ryan leaves the organized racing series forever. He accepts, and the final event begins.
Once every race is finally won, Ryan claims his car and his title as both the Showdown King and the Street King, designating his status as the best racer in the organization and one of the very best in the world. Ryo is dropped off the pedestal and the Apex Glide team forces him to leave due to his shame to their name and the sheer loss of his street cred. Cooper is praised by the massive crowd, and leaves the raceway victorious.
