A PSN code is PlayStation Network Code basically. Said to be one of the payments option set up by the makers- Sony so to buy new games from the network. Free PSN codes save young gamers with no credit or debit cards and let them have the latest online PSN subscription. However, there are lots of places from where you can purchase them such as your nearest petrol station or game shop. It’s absolutely safe and easy that you exchange your in-game credit for a card.