Story Ore Blog: world of warcraft map with levels

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Blizzard officially unveiled the new revamped Battle.net on March 20, 2009. It later revealed further details of the Battle.net revamped features at Blizzcon 2009 which will be supported by StarCraft II, Diablo III and World of Warcraft. The original Battle.net would also be renamed to Battle.net classic.

When the service initially launched with Diablo in November 30, 1996, Battle.net offered only a few basic services like chatting and game listings. Players could connect to the service, talk with other gamers and join multiplayer games of Diablo. Besides user account data, no game data was stored on the Battle.net servers. When a player connected to a game, they would be connecting directly to the other players in the game. No data was sent through the Battle.net servers. While this made the service quick and easy to use, it quickly led to widespread cheating since players using cheats could modify their game data locally. However, since there was an option to create private games, many players ended up playing with people they knew.

Diablo II was released in 2000 to much fanfare. The main highlight of Diablo II as it relates to Battle.net was that the game used the client–server model. The game was no longer simulated on each player's computer, but instead was run on Blizzard's server. This also meant that all of the character data for the game was stored on the Battle.net servers. The game also has an open character feature on Battle.net which stored the player's character on the client. This allowed players to play characters locally or on a LAN, and then use those same characters on Battle.net. However, any open games played on Battle.net were not protected from cheating by other players since they could have modified their characters locally. Diablo II also had a unique feature that would show the players in the Battle.net chat room as avatars who looked like their characters did in the game. It also used a different Battle.net interface than previous games, where previously there were mainly only color differences. There was also expanded ladder support including a "Hardcore" ladder which listed players whose characters would be removed permanently if they died in-game. Again, with Diablo II usage of Battle.net increased steadily, climbing even higher with the release of the expansion pack Diablo II: Lord of Destruction in 2001.

World of Warcraft initially did not support Battle.net, having separate accounts from Battle.net ones until the revamp of Battle.net on March 20, 2009 which forced players to merge their World of Warcraft accounts with the new Battle.net accounts. The features of Battle.net utilized in World of Warcraft include allowing players to engage in cross-realm, cross-faction and cross-game chat, which allows players to talk with their friends on their Real ID friends list, from other factions, other servers as well as other games such as StarCraft II and soon Diablo III. On November 11, 2009 Blizzard Entertainment made Battle.net a mandatory feature for World of Warcraft players.