# What RPG systems are Designed for a “Traditional” Call of Cthulhu Scenario

What RPG systems are there for a traditional Call of Cthulhu adventure (e.g. a basic premise of being investigators in 20th century/modern timeframe within the Lovecraft Mythos)? I know that there is the Chaosium Call of Cthulhu system, which I understand is the grandaddy of them all, and I have heard that a d20 version was made. Which others are there? Also, are they in print?

Also, could I have a bit of information about what the basic differences are (e.g. main mechanic, how it tries to capture the feel of the setting) to better help me decide which one I'd like to use?

I also realize that there are a bunch of other spinoff games based on the Cthulhu mythos (e.g. The Laundry and CthulhuTech) but I'm not interested in those at the moment. Also, I'm not looking for general horror RPGs, but rather ones that are specifically designed to be set in the Cthulhu Mythos.

As this is a game-recommendation question, please adhere to the FAQ, the rules for subjective questions as outlined in Good Subjective, Bad Subjective and our rules for game recommendations. All responses must cite actual experience or reference others' experiences!

• I'm torn on whether to close this as a duplicate of rpg.stackexchange.com/questions/5025/…, a bad old list style question itself, or because it's too vague of a question. What is the real problem you're trying to solve? This sounds like a system-recommendation question which should adhere to RPG.SE's system-rec guidelines on our Meta. In fact, I'm going to close this while clarification happens so we don't pull bad answers in the meantime. – mxyzplk Apr 29 '13 at 2:08
• I'm wondering, too, whether you've conflated Call of Cthulhu, the RPG, with the broader Cthulhu Mythos. Are you looking for all games that use the Lovecraftian Mythos, or specifically for variations on the CoC RPG? – SevenSidedDie Apr 29 '13 at 4:20
• My question as originally posted does have a lot in common with the question mxyzplk posted, which I didn't find because it was labeled with the cthulhu tag rather than call-of-cthulhu. I've revised my question to differentiate from that question by asking for systems that are for a "traditional" game used in the Chaosium system. – Thunderforge Apr 29 '13 at 5:39
• OK, so now this isn't a duplicate. Is it, however, a "practical, answerable question based on actual problems that you face"? I know we have a contest on but I don't want to see a lot of seeded questions garnering trivia for its own sake. Why do you need this, what end is it serving? – mxyzplk Apr 29 '13 at 11:47
• This does seem like a request for a list of Cthulhu-related RPGs, without any actual recommendations. It seems like you're asking for some Googling, rather than specific recommendations based on actual experience. – Erik Schmidt Apr 30 '13 at 0:39