# steamcmd > A command-line version of the Steam client. > More information: . - 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`