Counter-Strike - All entries from the main menu have disappeared!

Issue
Solution

Issue

The entries of Counter Strike main menu have disappeared ( New Game, Options, New Server... etc ).

What can be done to restore these entries?

Solution

- Go to C:\Program

Files\Valve\CStrike_version\cstrike\resource\GameMenu.res

.
- Open GameMenu.res file with a text editor (Notepad).
- At this point only the GameMenu entry should be present.

Replace the content of this file by the following:

"GameMenu"  
{  
"4"  
{  
"label" ""  
}  
"5"  
{  
"label" "#GameUI_GameMenu_ResumeGame"  
"command" "ResumeGame"  
"OnlyInGame" "1"  
}  
"6"  
{  
"label" "#GameUI_GameMenu_Disconnect"  

"command" "Disconnect"  
"OnlyInGame" "1"  
"notsingle" "1"  
}  
"7"  
{  
"label" "#GameUI_GameMenu_PlayerList"  
"command" "OpenPlayerListDialog"  
"OnlyInGame" "1"  
"notsingle" "1"  
}  
"8"  
{  
"label" ""  
"command" ""  
"OnlyInGame" "1"  
}  
"9"  
{  
"label" "#GameUI_GameMenu_NewGame"  
"command" "OpenCreateMultiplayerGameDialog"  
}  
"10"  
{  
"label" "#GameUI_GameMenu_FindServers"  
"command" "OpenServerBrowser"  
}  
"11"  
{  
"label" "#GameUI_GameMenu_Options"  
"command" "OpenOptionsDialog"  
}  
"12"  
{  
"label" "#GameUI_GameMenu_Quit"  
"command" "Quit"  
}  
}

Save the file (.res) and launch the game.

Thanks to Asgarel for this tip.