Asphalt: Injection is an offshoot of the Asphalt arcade racing series and partly based on Asphalt 6: Adrenaline. There is no story to speak of; the player just participates in street races on 20 courses loosely based on real cities.
The heart of the game is the career mode in which the player shoots up the ranks by winning events - there are overall 20 leagues with five events each. Overall the game features 10 racing modes: the new urban destruction mode (destroying items), normal races, time attack (checkpoint races), elimination (after a timer runs out, the last racer gets eliminated), cop chase (avoiding to get caught by cops), beat'em all (taking the opposition out by crashing them), collector (collecting items), drifting, duel (races against a single car) and under pressure (everyone crashes against the player). Each event rewards stars depending on player's performance and solving extra objectives which in turn unlock more of the 52 licensed cars. Those new cars along with upgrades are purchased with money earned by finishing events. On the courses, the player can find alternative routes and power-ups like turbo boosts or cash.
Besides the career, there is also a free playing mode (playing single events) and multiplayer for up to eight players.