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The console can be accessed by hitting the ~ "tilde" key while in-game.
|jointeam:||Joins a team. Usage: jointeam <team number> where 1 = Spectator, 2 = Northern Faction, 3 = Brenodi Empire, 4 = Auto-Select.||(No Default)|
|snd_mute_losefocus:||Set the sound to be on(0) or off(1), while the game window loses focus. For example when you alt-tab into desktop.||(Default = 1)|
|See Also: https://developer.valvesoftware.com/wiki/List_of_HL2_Cvars, List of Server Cvars|