2K Games has posted its fourth and final installment for its BioShock 2 Artist Series, a collection of works inspired by Rapture and its inhabitants. Famed fantasy/sci-fi artists Boris Vallejo and Julie Bell (married to each other) contributed this piece titled "Subject Delta", painting a scene of the underwater city in their own distinct style.

While 2K Games hasn't announced any plans to sell prints of "Subject Delta", it offers high resolution versions of the art (as well as other works in the series from concept artist Craig Mullins, Penny Arcade illustrator Mike "Gabe" Krahulik, and Invader Zim creator Jhonen Vasquez) as wallpapers for your computer, iPhone and Blackberry.

On the topic of BioShock and 2K Games, the developer is hosting a "Splicers Unite" event this Saturday at Boston's Faneuil Hall. There aren't many details on what to expect from the get-together, but the studio advises attendeeds to dress their best for a "Rapturian cocktail hour."