A full-blown expansion to Pulp Adventure (Second Edition)
From the back cover:
It's Time to Pulp Cthulhu!
Cthulhu Pulp provides rules for adventuring in the world of H.P. Lovecraft. However, in Pulp Adventure, you can actually fight the forces of the outer gods and the great old ones and drive them back to their primordial homes with super-science and muscle!