The core game remains the same as the original. It is a randomly-generated RPG shooter where the user guides Isaac through hordes of deranged and deadly enemies. This DLC adds another 100 hours of gameplay, with an expanded main game, as well as online leaderboards and an alternate soundtrack.
Sometimes a Steam Digital Code requires an US IP-Address in order to be activated on Steam. Read the store’s description if it’s only required for activation or if you also need an US IP-Address in order to play The Binding of Isaac Afterbirth Plus CD key. If you don’t know how to do this, most stores offer help or a tutorial.