The description of this neighborhood reveals that The Sims 3 is indeed a prequel to The Sims and The Sims 2 (Although The Sims 3 is the successor to both games), as Sunset Valley was apparently built before Pleasantview, and founded by the Goth family.A second neighborhood named Riverview The Sims 3: World Adventures introduced three sub-neighborhoods, Champs Les Sims, Shang Simla and Al Simhara.The freedom of The Sims 3 will inspire you with endless creative possibilities and amuse you with unexpected moments of surprise and mischief!Create over a million unique Sims and control their lives.
Aside from Riverview, more downloadable neighborhoods are available for sale from The Sims 3 Store.
Dragon Valley, a medieval themed world, was released costing for the standard version, and for the gold version.
In September 2013, a Gothic themed world, called Midnight Hollow costs 2,450 Sim Points for the standard and 4,350 for the gold.
The title was to be released on February 20, 2009 according to the official The Sims 3 website, but was delayed worldwide to June 2, 2009.
Electronic Arts cites the reason for the delay was to "create awareness for The Sims 3". It shows something towards a continuous, panning neighborhood, diagonal placings for objects, better lighting systems, and the ability to change shoes in the CAS, an ability previously limited to only console versions of The Sims.