Blizzard Entertainment issued a press release this morning announcing that sales of Diablo III in the first 24 hours totaled 3.5 million copies. They claim, (we assume based on NPD Group numbers), that this makes Diablo III the fastest selling PC game in history. We will not even try to refute that claim. That number does not include the more than 1.2 million players who received Diablo III as part of signing up for the World of Warcraft Annual Pass promotion. Combined that puts Diablo III's first day sales at 4.7 million.