The Diablo series are action role-playing games developed by Blizzard Entertainment. Diablo I sparked a revived interest in RPG gaming and initiated the explosive growth of Battle.net, Blizzard's free online gaming network. Diablo 2 carried over that success and broke records as the fastest selling PC Game ever. The series boasts thousands of magical items, numerous character classes, 3 difficulty levels, and many levels of action, adventure and role-playing.