What is the fine-grained topic of the following text: Even though the game doesn’t have a story mode, Blizzard does an impeccable job of providing the heroes with a rich and sometimes emotional background in the form of these animated shorts, and the quality is top-notch, easily comparable to something made by a studio like Pixar. Only return the topic.
Blizzard's high-quality animated shorts providing background for heroes in a game without a story mode.