From: 
Half-Life: Opposing Force: Focalpoint
// Valve Game Info file
// These are key/value pairs. Certain mods will use different settings.
//
game "Opposing Force: Focalpoint"
version "1.0"
size "96000000"
cldll "1"
hlversion "1111"
gamedir "focalpoint"
type "singleplayer_only"
gamedll "dlls\opfor.dll"
gamedll_linux "dlls/opfor.so"
gamedll_osx "dlls/opfor.dylib"
startmap "milbase"
icon "focal"