impact: is an Internet-based online game, social networking service, digital distribution, and digital rights management platform developed by Blizzard Entertainment. The service was launched on December 31, 1996, followed a few days later with the release of Blizzard's action-role-playing video game Diablo on January 3, 1997. was officially renamed to "Blizzard" in August 2017, with the change being reverted in January 2021. was the first online gaming service incorporated directly into the games that make use of it, in contrast to the external interfaces used by the other online services at the time. This feature, along with ease of account creations and the absence of member fees, caused to become popular among gamers and became a major selling point for Diablo and subsequent Blizzard games. Since the successful launch of, many companies have created online game services mimicking Blizzard's service package and the user interface. More information...

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