Quote from: Spinachcat;750227They aren't conducive for RPG play, but only his stories contain the purity of Lovecraft's tone and his words - that quality that the CoC adventures try to emulate and while any good horror GM can create a good horror adventure, the whole point of a Lovecraftian adventure is the Lovecraftian flavor.

I wasn't arguing against reading them, gawd forbid... just against the idea of reading them as the sole source of inspiration for what to do with CoC.
I've seen people talk about running 'pure' Lovecraft campaigns and I don't really get how they plan to pull that off.

Make a Sanity check.

Depending on your era of play, you may want to get Achtung Cthulhu!
If you want something pulpy and occult-heavy, you'll want to get "Raiders of R'lyeh", once its out!

Played it since 1st ed. Simply one of the best. If you haven't already check out the web material available.

Yog-Sothoth.com is invaluable with forums, articles, scenarios etc.

Pelgrane press publishes Trail of Cthulhu but has a load of material for background plus a couple of good free scenarios convertible to CoC.

Stealing Cthulhu is an extended essay by Graham Walmesley, author of some of the best ToC material, which basicly takes a hard look at using the original Lovecraft stories and learning from them when designing scenarios. It also then talks about swapping out elements of stories to refresh or create new ones. Excellent stuff! Highly recommended.

The H. P. Lovecraft Historical Society are a group of uber-fans who have made period movies (i.e. a silent film and a 30's style talkie) based on the tales. The site has tons of material including free props, period fonts etc. for your games. A must see (check out the trailers if you haven't seen their films.

Above all have fun!

Dave

Quote from: Ronin;750069Thats right just what the title says. Its all of your fault. (Well maybe a little bit of the d20 Monkey Innmouth Garden Society arcs as well:)) I finally bit the bullet and got off my cheap ass and bought CoC. OH my god! Fucking awesome! Best purchase I have made in a decade, easy. So that being said. I'm not looking for purchase anything else right away but what are good/useful supplements out there for CoC?

Stealing Cthulhu is an outstanding, system-free guide to running terrific CoC adventures, and horror adventures in general.  (You could easily replace Lovecraft with "Stephen King" and it would make an excellent guide to running games in King's Maine.)  

Delta Green: Countdown is one of the best CoC books ever written, hands-down, anybody who tells you otherwise is crazy.  

If you don't mind converting from Gumshoe -- and I believe some fans have already done the work for you -- I would recommend the Armitage Files and Eternal Lies.  EL is a gigantic whale of a campaign that's a little less pulp than Masks of Nyarlathotep, but very well done, and Armitage Files is a really bizarre temporal sandbox kind of adventure.  It's hard to explain but really neat.

I'll also say that CoC's fans are if second, second only to Pathfinder's, for the sheer amount of fan support for published adventures.  I mean, Masks of Nyarlathotep has thousands of pages of support and documents drafted by fans.  Don't be afraid to check out Yog-Sothoth.com and other sites for this stuff.

Welcome to the cult- er I mean club.
I heartily agree with others suggestions of Delta Green, the Malleus Monstrorum, and the Keepers Companion. All are books I browse over and over again for ideas for all sorts of rpgs not just CoC.
Another idea, depending on what era you play, is the news or real world history articles. They can be mythos up quite easily and often make for good adventure hooks.
Wikipedia something like the Dyatlov Pass incident or the Fatima Prophesies and watch the creative gears start turning.