Having made what preparations you could, you must help the Orcs' slaves reach the exit of the mines as you fight your way past the brutal Orc-overseers.
Fight your way towards the forges and free any slaves you come across.
Fight your way up onto the platforms to reach the bridge spanning the cavern.
The shortest way out of the Orc-mines lies across a long trestlebridge that spans the cavern. It is likely to be the most perilous step of your escape.
You must make your way up the slopes, then fight your way past any remaining Orcs to the exit of the caverns.