A movie adaptation of the popular video game “BioShock” has been in the works for some time, thanks to Gore Verbinski’s dedication to the project, but he couldn’t get people to back the film if it has an R rating, according to ScreenRant via Coming Soon.

He told Coming Soon that the movie adaptation of the video game failed because “I couldn’t really get past anybody that would spend the money that it would take to do it and keep an R rating…Alternately, I wasn’t really interested in pursuing a PG-13 version. Because the R rating is inherent…It’s a movie that has to be really, really scary, but you also have to create a whole underwater world, so the pricetag is high. We just didn’t have any takers on an R-rated movie with that pricetag.”

He also said that if the film got made, it would have been perfect for the 3D trend in movies right now. “I’d like to go into that world wearing a pair of glasses,” he said.  “I think in general, gaming is perfect for 3D.”

Even though “BioShock” failed, Verbinski is hard at work promoting his latest film, “Rango,” a 3D-animated film starring the voice talents of Johnny Depp, Isla Fisher, Timothy Olyphant, Abigail Breslin, Bill Nighy, Alfred Molina, and Ned Beatty.