Originally Posted by JDR13
They can claim to view it however they like, but it's obviously not a typical expansion. It's a standalone game with a full campaign and access to all the races in multi-player… just like the first game. The term "expansion" is being used for marketing purposes.
Originally Posted by amazon
Please Note: Starcraft II: Heart of the Swarm is an expansion pack and requires Starcraft II: Wings of Liberty to be played.
Originally Posted by blizzard
For the regions that have a standard box business model such as North America and Europe, yes, Wings of Liberty will be required in order to play Heart of the Swarm.