This occurs because your game client does not match the version on our servers.

Battle.net Mobile Appに必要なOSバージョン

Unable to enter overcrowded WoW Classic realms

General information on the Starter Edition of StarCraft II

Troubleshooting steps for latency or connection issues when playing Blizzard games.

For issues purchasing WoW Token with gold.

List of limitations to buying a WoW Token

Troubleshooting the World of Warcraft Armory site not matching in-game information

Troubleshooting for latency and connection issues in Heroes of the Storm.

Battle.net Appが正しくインストールまたはアップデートされない場合、またはクラッシュする場合の問題を解決するための手順。