A career-based expansion pack and introduces new career pathways, changing the style of gameplay involved in the game. In the non-Ambitions version of The Sims 3, all careers were known as "RabbitHoles", a reference to Alice in Wonderland and her disappearing in a rabbit hole. All careers would have a specific building (Political : City Hall; Law Enforcement : Police Station; Medical : Hospital; etc). However, with Ambitions, the new careers have completely hands-on gameplay, meaning that the player can control whatever their sims do in their careers.
Such examples of career pathways include firefighting, investigator and stylist. Fulfillment of duties and tasks associated with careers are committed by the players. Firefighters maintain equipment, extinguish hazardous fires, rescue Sims from burning buildings and clear rubble. Investigators solve cases and mysteries by convincing or bribing Sims for information, breaking into homes for clues or stealing items for evidence. Stylists are hired by neighbors to offer fashion advice and provide makeovers. The success or failure of task and duty outcomes is completely controlled by the players.