To play SC2 without a constant internet connection, you must first authenticate your account while online. Once authenticated, the client stays valid for offline use for before requiring a brief reconnection.
: Navigate to StarCraft II\Support\SC2Switcher.exe . starcraft 2 offline installer
To install StarCraft 2 offline, you'll need to obtain an offline installer package. Please note that Blizzard Entertainment does not officially provide offline installers, and using such installers may violate the game's terms of service. However, for educational purposes, here's a general outline of the installation process: To play SC2 without a constant internet connection,