The Altar — Lisa's Grave

You come out back in the cabin — grab the photograph on the table, then head to the shed and cross through the door back into the mansion proper.

Retrieve the stone-and-metal object you used to open the blue door back in the Grand Gallery passage. Open the second Jewelry Box from the tunnels to get the Stone Ring, then combine it with the other metal object you're carrying. Bring both Medallions — Wolf and Eagle — along with you, and head to the door tucked behind the Main Hall staircase.

Use your combined objects to unlock the door. As it opens, you hear Lisa Trevor's mournful cries echoing from somewhere deep inside.

Inside is a typewriter and item box. Take the Magnum, Grenade Launcher, and any herbs you can carry, and save before continuing — you're about to fight Lisa for real.

Head down a stone passage with stairs, cross a door, and descend more stairs — you're back in the mine tunnels briefly before reaching a set of steps down into an underground Altar. Barry is waiting there.

Barry admits he was worried about you — Jill grabs his gun and strikes him for his betrayal, just as a monster crashes in and seals the doors. Barry begs for his weapon back.

"I can't believe that thing's actually dead," Barry says, heading for the exit and telling you he'll follow shortly. Take the photograph inside the broken coffin before you leave.

Ride the elevator up into a garden with a fountain. Insert the Wolf Medallion and Eagle Medallion into the sockets at each end — the water drains away, revealing a hidden entrance to the underground laboratory. Descend and step through the door.