就是steam启动时候的一些启动项啦，没太多内容，记录下。

• -login – Bypass the Steam login window by entering your login information
• -tcp – Launches Steam with the TCP protocol rather than the UDP protocol
• -clearbeta – If you have opted into a Steam client public beta, opts out and returns Steam to the current official release.
• -silent – Launches Steam to the system tray only. Normal Steam windows will only appear after clicking the system tray icon. If a password is not stored, the normal login window will still be displayed.

• -login – 登录方式，可以用 -login username password 方式登录
• -tcp – 使用tcp协议启动替代默认的udp协议
• -clearbeta -清除测试信息
• -silent – 静默启动，不会弹出窗口，直接启动到最小化的图标。