In Chapter 3.2 of Hunted: The Demon’s Forge, you’ll start where you left off in Chapter 3.1 of the game. This would be on the path that was once blocked with debris.
Continue down the path and shortly along the way, look to the right. There will be a small area containing the twentieth corpse containing Death Stone. Collect this, and continue until you see some enemies. There will be a good number of them, so you’ll have to play smart. Don’t take the aggressive approach if you don’t think it will work well enough for you. I’d suggest being a bit tactical about it. Once the hoard is defeated, continue along the path until you see a cave. Then, free prisoner 15. Upon freeing him, there will be a few enemies to fight, but you should have no problem handling them.
There will now be a visible gate. Go on through it, and collect the twenty-first Death Stone from it’s corresponding corpse. Continue down the path to find the petty cave and enter it. Rescue prisoner 16, and go through the gate that is now open. From here, you have completed Chapter 3.2 of Hunted: The Demon’s Forge.