Simplify the following text for a Grade 6 native English-speaking person.
Original: It is the prequel to the best-selling computer game , The Sims 2 . It was first released on June 2 , 2009 simultaneously for Mac OS X and Microsoft Windows .
Simplified: The Sims 3 is a computer game for Microsoft Windows and Mac OS X. It was released on June 2 , 2009 and is a sequel to the popular The Sims and The Sims 2 computer games .