steamcmd

A command-line version of the Steam client. More information: https://manned.org/steamcmd.

• Install or update an application anonymously:

steamcmd +login anonymous +app_update appid +quit

• Install or update an application using the specified credentials:

steamcmd +login username +app_update appid +quit

• Install an application for a specific platform:

steamcmd +@sSteamCmdForcePlatformType windows +login anonymous +app_update appid validate +quit