1. Download and install the Origin/EA APP program. (Http://www.origin.com/download) 2. Start Origin/EA APP. 3. Select an interface language, and the place where the game is installed. 4. Go to "Origin/EA APP-Configure and manage." 5. Select "Activate product code." 6. Enter key received after payment. 7. After the activation of the game will be a bookmark to your profile and a list of activated games. 8. Select Battlefield 4, and then press "Start". 9. Download and install the game.