I'm developing a scenario I'd like to use with OGL Horror, but as I don't have my copy yet I'd like to ask if anyone can tell me if there's any big differences between it and Call of Cthulhu d20 I should be aware of. I don't mind restatting a few NPCs because of differences in the class system, but any kind of heads-up anyone can give me would be appreciated.
Thanks!
Thanks!