Play a buffing sound when getting the free heal in the crypt. Ramped up the difficulty of the Shasta Dam finale: pistol and shotgun grunts are more powerful; after Tabitha flees, switch to a new set of enemies who are 1 tier higher than before. Slightly decrease the maximum wait for Tophet to rage (from 30 to 25, from an original of 40). Increased the difficulty of the grunts on the bottom floor of the caverns: they're now 1 tier higher than before, and spawn two-at-a-time, giving a stronger incentive to vacate quickly. Clean up some unused props in the caverns.