I was just watching a popular board game video review about 'Mansion of Madness' that described it as taking place in the world of 'Arkham Horror' .
My first reaction was, I know Arkhah Horror is a popular franchise, but surely the credit should go to Lovecraft. Then my thoughts turned to Chaosium, who's 'Call of Cthulhu' trade mark is acknowledged on the box of Arkham Horror. However, there is no such credit at all on the Mansions of Madness box of manual.
I know HPL's works are in the public domain, and Arkham Horror is the reworking of an old Chaosium game (therefor has a licenced IP) . But surely MoM borrows many elements from CoC (investigator, keeper, Harvey Walters, even Mansions of Madness). I suspect that FFG's Cthulhu Mythos based product would be significantly outselling Chaosium's nowadays. Arkham Horror has certainly been a huge selle, and appeared to really launch the success in high component quality, theme rich board games that we all enjoy today.
I find it interesting that MoM does not appear to owe any licence to Chaosium. Is FFG biting the hand that fed them?