[1]
[CITE[.: Half-Life Protocol -- the official website :.]] <http://www.stivan.dk/hlprotocol/#web>
([[名無しさん]])

[2]

> In v3.6 another URL Protocol has been added (steam). This makes it possible to force users to upgrade their client for Steam-support. The new protocol goes something like this:
> <a href="steam://[ip]:[port]> Click and FRAG! </a>
> Of course, both protocols (halflife:// & steam://) will work just the same, only difference being that steam:// forces the user to upgrade from previous versions. 


[3] [CITE@en[Steam browser protocol - Valve Developer Community]]
([TIME[2015-05-11 05:02:38 +09:00]] 版)
<https://developer.valvesoftware.com/wiki/Steam_browser_protocol>

[FIG(quote)[
[FIGCAPTION[
[4] [CITE@en[Steam browser protocol - Valve Developer Community]]
([TIME[2015-05-11 05:02:38 +09:00]] 版)
<https://developer.valvesoftware.com/wiki/Steam_browser_protocol>
]FIGCAPTION]

> steam:"<commands>"
> Opens Steam with command line arguments,

]FIG]


[FIG(quote)[
[FIGCAPTION[
[5] [CITE@en[Steam browser protocol - Valve Developer Community]]
([TIME[2015-05-11 05:02:38 +09:00]] 版)
<https://developer.valvesoftware.com/wiki/Steam_browser_protocol>
]FIGCAPTION]

> steam://ackMessage/ackGuestPass/<pass>

]FIG]