LOS ANGELES (AP) - "BioShock" is returning to the sea.

LOS ANGELES (AP) "BioShock" is returning to the sea.

Irrational Games creative director Ken Levine says an upcoming downloadable chapter of the popular video game "BioShock Infinite" will be set in Rapture.

The fantastical underwater metropolis served as the moody locale for the original "BioShock" shoot-'em-up game in 2007. The follow-up "BioShock Infinite" was released earlier this year and traded the 1960 dystopia of Rapture for the idealistic 1912 floating city of Columbia. "Infinite" was the top selling game in March, according to NPD Group.

Levine said Monday the two-part, story-driven chapter will be titled "Burial at Sea" and feature "Infinite" protagonists Booker DeWitt and Elizabeth mysteriously meeting in the submerged city in 1958 before its demise.

"I just had this vision of Elizabeth dressed in that period looking like Veronica Lake or Rita Hayworth," said Levine. "I just said, 'I want to see that image. I want to see Elizabeth in Rapture.'"

Levine hinted the downloadable adventure would marry the two worlds, explaining how the characters don't remember each other and how the all-important vigor powers from Columbia made their way to Rapture and became drinkable. He also noted that this version of Rapture would be livelier than the one glimpsed in "BioShock" and 2010's "BioShock 2."

"We didn't have the opportunity in the first game to have civilians in Rapture," said Levine. "It just didn't exist because everyone was dead. It's been interesting to find the tone. These are the people that bought into the vision (Rapture founder) Andrew Ryan was presenting and made their life down there."

The second part of "Burial at Sea" will allow players to portray Elizabeth, the mysterious young woman who manipulates space and time in "Infinite." Originally, Elizabeth was intended to remain as a companion to Booker.

"We thought that how part one of 'Burial at Sea' ends naturally gives Elizabeth something that was important for her to do," said Levine. "It wasn't always the plan, but once it came up, we realized it had to be that way."

Despite the franchise's upcoming return trip to Rapture, the first chapter of downloadable content for "Infinite" will be planted firmly on Columbia. It's called "Clash in the Clouds" and is a fighting-focused mode set for release this week for PC, Xbox 360 and PlayStation 3 that takes place in four previously unseen areas of Columbia. "Burial at Sea" is expected later this year.





Follow AP Entertainment Writer Derrik J. Lang on Twitter at http://www.twitter.com/derrikjlang