Blizzard Entertainment says Diablo III, the next in its series of role-playing games, will arrive May 15. It will be available for Mac OS X and Windows at a suggested price of US$59.99 for both the retail DVD-ROM version and the digital version sold directly from Blizzard.

A special alabaster-white Collector’s Edition, sold exclusively in retail stores at a suggested retail price of $99.99, will include the full game on DVD-ROM, a behind-the-scenes Blu-ray/DVD two-disc set, the Diablo III soundtrack CD, a 208-page Art of Diablo III book, and a 4 GB USB soulstone (including full versions of Diablo II and Diablo II: Lord of Destruction) and corresponding Diablo skull base, as well as exclusive in-game content for Diablo III, World of Warcraft, and StarCraft II: Wings of Liberty. Diablo III has received a Mature rating from the ESRB.

Starting May 15, gamers will be able to purchase Diablo III at retailers throughout the United States, Canada, Europe, South Korea, Southeast Asia, Australia, New Zealand, and the regions of Taiwan, Hong Kong, and Macau. In addition, gamers in the regions above as well as in Mexico, Argentina, Chile, and Brazil will be able to buy Diablo III digitally via Blizzard’s Battle.net website.

Players in the listed Latin American countries and in Russia will be able to purchase Diablo III at local retail locations starting June 7. Digital availability for the Russian version of the game will also begin June 7. In addition to the English version, Diablo III will be fully localized into Latin American Spanish, Brazilian Portuguese, French, German, European Spanish, Italian, Polish, Russian, Korean, and Traditional Chinese.

Blizzard also kicked off global digital pre-sales for Diablo III today. Head to http://www.blizzard.com/games/d3/ now to reserve a digital copy.