I don’t have details on how much the MCF games have sold individually, but now as the 5th title Mystery Case Files: Return to Ravenhearst in this series was launched Big Fish Games reported that:
“The Mystery Case Files franchise has sold more than 2.5 million units thus far.”
Not sure how many $6,99 game club discounts and how many $19,99 purchases that contains but even $10 average would mean 25 million dollar sales, which is pretty nice sales for 4 casual games.

Thanks!
that’s awesome
Here’s a stats update for your post :)
“The company’s latest big release, Mystery Case Files: Return to Ravenhearst, has sold 100,000 in its first week, and Thanksgiving weekend was Big Fish’s biggest sales weekend ever, says Walcott”
Quoted from this article:
http://www.xconomy.com/seattle/2008/12/08/big-fish-swims-against-current-looks-for-new-hires-and-not-only-for-games/
Well, I know I’ve done my part to support them. I’ve purchased all of the MCF games (the PC titles, anyway), and I love ‘em. Very well made and highly polished.
It’s 4 MCF games excluding Return to Ravenhearst which has only been out for a week (so probably not included in that statistic): Huntsville, Prime Suspects, Ravenhearst (1), Madame Fate.
Other BFG HO games are the Hidden Expedition series: Titanic, Everest, Amazon. And also some 360 Travelogue games and Mystery in London. Other HO games are purchased IP.
Very impressive (though I think it’s 5 PC games plus 2 other, to be exact). And this series is really well executed. Especially the new Ravenhearst. Can’t help but admire the attention to details in this one. Delicious!
Works for me.