Mystery Case Files: Key to Ravenhearst is the twelfth installment of the Mystery Case Files franchise and is the first to be developed by Eipix Entertainment. Key to Ravenhearst was released on October 27, 2015.[6] Key to Ravenhearst will be the third instance the series has returned to the Ravenhearst storyline, thus the fourth installment in the Ravenhearst story-arc.

"It's rumoured that Ravenhearst is being resurrected, and the Queen of England herself has called on you to help unlock the mystery. But can you find the key? Follow the dark clues down a twisting and twisted path into Ravenhearst's horrific past. The future just might depend on it!"

Mystery Case Files - Key To Ravenhearst