Lamentations of the Flame Princess is an OSR clone which seems to lean on RedBox D&D. Its differentiation seems to be a love of weird fantasy and the aesthetics of gore and porn-filled horror movies, hence the labelling of the boxed set as the "Grindhouse" edition. I picked up the box at Dragonmeet 2011 as you have to admire the commitment to the project.

The box set contains a bag of dice and three booklets: an introductionary tutorial and two rule books.