Best known for blockbuster hits including the Warcraft series, StarCraft®, and the Diablo® series, Blizzard Entertainment is a premier developer and publisher of entertainment software renowned for creating many of the industry's most critically acclaimed games. Blizzard's track record includes six #1-selling games and multiple Game of the Year awards. The company's free Internet gaming service Battle.net® reigns as the largest in the world, with millions of active users. For more information, visit the official site.

Sierra Entertainment is one of the original developers and largest worldwide publishers of interactive entertainment software. Sierra is renowned for releasing critically acclaimed and award winning titles that represent a wide variety of computer entertainment on both next generation console and PC platforms. For more information, visit the official site.