plot:-
Driving through Carbon Canyon in route to Palmont City, a flashback of what seems to be a race against Kenji, Angie, and Wolf comes to the player's mind. A police incident at the end of the race forces the player to make a hasty escape from Palmont.
game play:-
The gameplay is based upon rival street racing crews.

Players run a crew and can hire specific street racers to be in their crew. Each hirable street racer has two skills, one which is a racing skill (scout, blocker, and drafter) and a non-race skill (fixer, mechanic, and fabricator). Each skill has different properties from finding hidden alleys/back streets to reducing police attention.

In career mode, players have to race tracks to conquer territories and face off against bosses to conquer districts.

Unlike Need for Speed: Most Wanted and Underground, Carbon had no drag racing. However, Carbon features the return of drift racing, a mode that had been included in two previous installments Need For Speed: Underground and Underground 2, but omitted from Carbon's predecessor, Most Wanted; and new style of race, Canyon Racing, based on Japanese Touge races. There are four types of Canyon Races: Canyon Duel, Canyon Race, Canyon Checkpoint and Canyon Drift. Canyon Duels consists of two stages. In the first stage the follower gains points contingent on how tight and aggressive he/she can follow the leader. In the second stage the follower takes the lead and loses points depending on how good the first stage leader follows the follower. The follower wins the duel by reaching the finish line with the most points. The leader loses the race if the follower passes the leader for ten seconds. The follower loses the race if he/she falls behind for ten seconds. Either car will lose the race if one falls off the cliff. Checkpoint races works the same way Tollbooth races worked in Most Wanted — players must get from one point to another within the allotted time.