No love for the original from Chaosium? The BRP system, being far more deadly and generally lighter-weight than most d20 I've seen, emulates Lovecraftian horror far better. And it's still in print.
Originally Posted by Webhead
"On two occasions I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question."
- Charles Babbage (1791 - 1871)