The Sims: Unleashed is the fifth expansion pack for The Sims , a computer simulator developed by Maxis and published by Electronic Arts . It was released on September 25, 2002 in the United States. The add-on introduces pet cats and dogs to The Sims that the Sim can train, as well as the ability to practice gardening.
Animals became the theme of the add-on, since according to the developers, this was the most coveted expansion that players were waiting for. The creators have also added new residential lots. As a result, Unleashed became the best-selling expansion for The Sims