Unfortunately, after years of hosting my implementations of Ingenious and Callisto online, and having been granted the rights from Sophisticated Games to host the versions, I’ve been contacted by the personal assistant to Reiner Knizia (Karen Easteal) informing me that I must take down the games or pay a yearly licensing fee.
As I don’t make any money from the implementation, it makes no monetary sense for me to keep hosting the game and sadly I had to remove it.
If you’d like to voice your opinion about the games, you can contact Knizia-Games using known public contacts and social media and include how these implementations may have encouraged you to purchase your own copies. By doing so, it may help them see how this site provides free advertising for those who might otherwise ignore or know little about the games.
TWITTER: @ReinerKnizia
http://www.knizia.de/media-enquiry/
Board Game Geek
I wrote to them via the website you provided. What a shame. Narrow-minded lawyers, I’m sure.
There exists no copyright on game rules. As long as you don’t verbatimly copy a text with the game rules or the design of the board, and as long as you don’t call your website Callisto (which could violate trademarks, however you are allowed to refer to an existing game with that name), they have no legal standing. But they probably assume that legal threats are enough to deter people.