Shift 2: Unleashed (also known as Need for Speed: Shift 2 – Unleashed) is a simcade racing video game, the seventeenth installment of the Need for Speed series. It was developed by Slightly Mad Studios and published by Electronic Arts. The game serves as a direct sequel to Need for Speed: Shift and expands on many aspects that were introduced in the original.

Shift 2 claims to redefine the racing simulator genre by delivering authentic and true-to-life dynamic crash physics, intricately detailed real-world cars, drivers and tracks.[12] During their careers, virtual racers partake in a variety of motorsports — like drifting, muscle car racing, retro car racing, Endurance races and circuit competition (i.e. FIA GT3 European Championship) — to hone their driving skills in hopes of becoming the FIA GT1 world champion.

In the career mode, Vaughn Gittin, a Formula D Champion guides the player through his career, customizing the car, Autolog, teaching the player how to drift, so the player would head on to the FIA GT3 and the Works series. Then, he begins to move on to the FIA GT1 Championship. Gittin also will be in the Muscle series. The career mode also features the Formula D driver Darren McNamara in Retro series, Chris Rado in Time Attack and Drag Racing (DLC) series, Eric and Marc Kozeluh in Standing Mile (DLC) series, Mad Mike Whiddett in the Works series, Patrik Söderlund in the FIA GT3 series, Tommy Milner in the endurance series, Matt Powers in the Legends (DLC) series, and Jamie Campbell-Walter in the FIA GT1 series. These racers even wager their own cars to the player as prize cars, should the player win their respective championships.

As well as an in-car camera view, Shift 2 includes a 'helmet-camera' in which the player's viewpoint is from their driver. The helmet cam moves with the head of the driver, being drawn from side to side as the car takes corners and jerking forward when the player crashes. As the car comes up to higher speeds, the edges of the screen will become blurred to simulate the tunnel-vision effect that drivers suffer when racing. Shift 2's night racing also appears to be more advanced, with headlights dimming or turning off completely if damaged, further narrowing the player's view.

The Autolog system is now 'Need for Speed DNA'. The system appears in Shift 2 in a more-or-less identical design to the original, but includes extra features that they not only provide track times for unique events, but also segregate data based on quick race tracks, race types and automotive disciplines. This essentially means that Autolog is more than just a system that simply displays player friend's times regardless of how, or when, they set them during their career.

Shift 2 features more than 140 licensed vehicles available for racing and tuning, a smaller number compared with racing sims such as Forza Motorsport 4, and the 1200 cars found in Gran Turismo 6. However, executive producer Marcus Nilsson said the studio wanted to concentrate on having only the must-have speedsters. There are also 40 real-world locations including Bathurst, Spa and Suzuka as well as fictional circuits like downtown London and Shanghai.