Cthulhu is a 2007 film inspired by a novella by H.P. Lovecraft. I tried to watch it but gave up half-way through having given up hope that anything would ever actually happen. It got some good notices, though, so I'm sure it would reward a complete viewing, but I'm not going back to it. Your mileage may vary, as they say.
Dread Central gives it 5 out of 5 stars and says, "The experience of watching this film was as perfect a translation of modern times through the lens of Lovecraft as I have ever seen attempted". Rotten Tomatoes had 62% of their critics give it positive reviews.