To start playing you need to:
- Download and Install Steam (if it has not yet been installed);
- Create an account in Steam or log in with the existing one;
- Go to the section "Games" and choose "Activate through Steam...", get aware and confirm the agreement of the Steam service, and enter the key code which you received after the payment;
- After the activation the game will appear in the list of the games and you will be able to download it from Steam. The process of installing (downloading) takes approximately 10-60 minues (depending on the existing internet-channel).