Battle.net 2.0
Blizzard released its revamped Battle.net service in 2009. This service allows people who have purchased Blizzard products (StarCraft, StarCraft II, Diablo II, and Warcraft III, as well as their expansions) to download digital copies of games they have purchased, without needing any physical media. In the future, it will store a player's "Blizzard Level" (similar to a Gamerscore).
On November 11, 2009, Blizzard required all World of Warcraft accounts to switch over to Battle.net Accounts. This transition now means that all current Blizzard titles can be accessed, downloaded, and played with a singular Battle.net login.
Battle net 2.0 is the new platform for matchmaking service for Blizzard games which will offer players a host of additional features. Players will now be able to track their friend's achievements, view match history, avatars, etc. Players will also be able to unlock a wide range of achievements (rewards for completing game content) for Blizzard games. This means players can enjoy new avatars, decals, badges etc, for their accounts.
The service will also allow players to chat simultaneously with players from other Blizzard games. For example, players no longer need to create multiple user names or accounts for most Blizzard products. StarCraft II, Diablo III and World of Warcraft will support the ability for users to cross communicate in game. This means that a player could be in a game of StarCraft II, and he/she may send or receive messages from friends playing World of Warcraft or Diablo III. Moreover, Battle.net 2.0 will track a player’s progress and skill level, and match make them with other players of even skill level. This way, everyone can enjoy the games and will only play against people who are just as good or bad as them. No player will ever feel that they are at a disadvantage. For example, in StarCraft II, a player's skill level is determined based on a modified ELO rating system, known as MMR (Match making Ratio).
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