Moonlight Bay is a pre-made neighborhood that shipped with the Xbox 360 and PlayStation 3 versions of The Sims 3. The Wii version uses a beach town known as Vista Beach and the Nintendo DS version uses a separate neighborhood known as Beacon Bay. The neighborhood's name may be a pun on Sunset Valley. Although there are many families, only six are playable (excluding the families in the family bin), and only nine out of fifteen lots in the neighborhood can be lived in. It is possible to play as the other Sims by asking them to move in or by marrying them, but they can only live in the same house as the player.
Malcolm Landgraab moved from Sunset Valley in order to extend the reach of the Landgraab family. With good looks and a sharp wit, Malcolm has carved out a nice section of the town as his own. Now he has eyes on the mayor's office as he grooms his son to overtake the business centers in town.
Penny has lived in Moonlight Bay all her life. She is completely dedicated to its preservation and the safety of her neighbors. Too bad her neighbors think she's a little overzealous with their safety.
Cevin and Willow grew up in Moonlight Bay and were looking for a way out from under their parents constant grief over, "...all that black clothing." When Morgan moved into town, he was thrilled to find at least a couple of people that understood him and they became quick friends. The only question is, when did their new friend Rain decide to move in and should they kick her out?
Heather has been dancing on clouds since marrying her new husband, Tyler. Tyler loves to dote on his wife despite the ribbing he gets from his coworkers about marrying an older woman. Elaine, on the other hand would have rather stayed with her bio-dad. Can Tyler and Elaine work out their differences or will things always be uncomfortable between them?