League of Legends is a popular free to play MOBA by Riot Games. Recently, company president Marc Merrill’s Twitter account was hacked by someone using the Alias, Jason. They used Marc’s account to send out several tweets with screenshots and files, revealing what appears to be an online trading card game based on the League of Legends universe.
The hacker claims the game was completed but never revealed to the general public. Riot Games confirmed the games existence though said it is all a part of experimentation that may never see the light. Whether it stands to be released or not is unconfirmed, though it would make sense with the success of Hearthstone: Heroes of Warcraft recently.