This guide will teach you how to use Starcraft 2 cards.
Starcraft 2 Game Card Activation
1. You must have an existing Battle.net account.
If you don't have one, register one.
2. Go to www.battle.net/sc2/gamecard
3. Enter your Starcraft 2 code
4. Log in to play Starcraft 2
Purchase Starcraft 2 - Wings of Liberty
Pre-purchase Starcraft 2 - Heart of the Swarm