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