Mystery Castle games Episode 1 and Episode 2 are currently just $0.39 when factoring in Amazon Coin rewards. That’s 80% off their regular price of $1.99. This is the lowest these two games have ever been. The games have been $1.99 with a 120 coin reward in the past, but fore the first time have dropped to $0.99 with a 60 coin reward. The other three episodes of the series are also discounted at $0.79 each when you factor in Amazon Coin rewards.