From the campaign:
Unspeakable Words™ is the Call of Cthulhu Word Game designed by James Ernest and Mike Selinker. In the game, you and your opponents will attempt to form words from the letter cards in your hand. Each letter is worth points – the amount of points is determined by the number of angles in the letter (where the hounds of Tindalos are lurking!). You may try to make the highest scoring word possible, but… you’ll have to test the strength of the word against a roll of the 20-sided die. Roll equal to or higher than the value of your word and you’re safe… but roll less than the value of your word and you lose a precious piece of your sanity, represented by an adorable Cthulhu pawn!
Each letter is uniquely illustrated with a horrifying character from the works of H.P. Lovecraft, which adds to the dark whimsy of the game.