The most surprising addition is the multiplayer, giving you and three friends the opportunity to traverse a mansion together and compete in various challenges. (snackbar-games.com)
One surprising addition for a cheap phone is the ability to support motion data collection, meaning your phone will track and record your movement and location. (techradar.com)
This item wasn't on the card included in my box, but it was an excellent surprise addition. (ispyplumpie.com)