uhm you can make a link on your desktop, make a link like this.
first just make a half life link to the normal half life game. it's:
<font color="#3399FF">C:\SIERRA\Half-Life\hl.exe</font> by default.
put this behind it -console -game esforces
it will look like this:
<font color="#3399FF">C:\SIERRA\Half-Life\hl.exe -console -game esforces</font>
glad i could help