Introduced in the Hot Summer Update, Car Mastery (or just Mastery) is another single player game mode. It offers 15 single-lap races, called Challenges, for each car of the game, with the possibility to earn Credits, Car Upgrades, Pro Boxes, Boosters, and Licences.
For each car in the game, there are 15 Races available, in increasing difficulty: the cars of your NPC opponents will be gradually increase from initial rank to max to max+pro. To be able to accept a challenge, i.e. take part in the race, you have to complete the previous challenges. Also your car has to have a certain level, the first 5 challenges being available without upgrades, increasing until Challenge 15 which requires a pro'ed car.
Challenges are either of type Classic, Unplugged or Flawless. Classic means you have to finish first, Unplugged means there are no Nitro refills on the track, and Flawless means no crash: if you crash, you are immediately disqualified, and the race ends.
Licences work as an experience level, similar to the star system, which you cannot buy but only earn. However instead of giving you access to new levels, the licences give you access to new Decal packs, ans well as some cars apparently exclusively available through licences: Camaro Z/28 (300), Datsun 280Z (650) and Shelby Cobra 427 (1050).
The Mastery mode is not interesting for farming in the classical sense unless you have pro'ed your Class S or Class A car. For instance challenge 15 in for Mercedes-Benz Silver Lightning in Tokyo gives 5,925, however Tokyo is a long track, of Unplugged type, and opponents are at the same car upgrade level as you.
However in a less strict sense of the term, you can earn a lot of Credits while playing: the total of Race Rewards is estimated to 4.500.000, the medals reward around 400.000, and the Challenge Rewards 11.000.000, not counting the value of the Pro Boxes, Boosters or car upgrades.
For each race you play in the Car Mastery mode, you get a number of rewards. Similar to events, you can cash in those rewards after the race, or you can decide to leave them for later.
For each Challenge you get a Credits reward, and for Challenge 5, 6 (mostly), 10 and 15 you get an additional reward amongst the following:
- Tuning Kit
- Nitro Starter
- Class Upgrade
- Upgrade for Class D
- Upgrade for Class C
- Upgrade for Class B
- Upgrade for Class A
- Upgrade for Class S
- W Motors Lykan HyperSport #5
- Upgrade for Class D
- Extra Tank
- Double Credits
- Pro Box