For those with the Portal-Unleashed release.
Get /portal prelude from Steams /steamapps/steammods directory or whatever it is...rename it "portalprelude" and place that directory in the same directory as hl2.exe
Go into /portalprelude and open gameinfo.txt
Change
{
Game |gameinfo_path|.
Game portal
Game hl2
}
}
}
to
{
Game |gameinfo_path|.
Game portalprelude
Game portal
Game hl2
}
}
}
Save the file.
Create a shortcut to hl2.exe...adding the -steam -game portalprelude to the end.
(found out by ShawnZ
)