Here are a few links you may want to check out -- S-P-O-N-G-E is a good one in particular. Drop me a line if you want me to add you site.

S-P-O-N-G-E Cthulhu website

Steve Jackson Games' GURPS

Delta Green modern Cthulhu

Into the Darkness: GURPS Black Ops

Gunmetal Blue: GURPS over the top action