How do I get the Sunstone? [T]

If you talk to Sophia, you should find out that you need to trick
Trottier into giving it up in a seance.

Once you find Trottier, make sure that Indy doesn't patronize him.

And make sure you've read enough of the Lost Dialogue that you can
answer the question he asks you.

Once you've managed to talk to Trottier, you will need to scare him
into up the stone.

Go up to the hotel room to start your trickery.

You should find out after a bit of experimenting, that Sophia can't do
anything to trick Trottier.

Just make sure that Sophia is subtle when she tries to get Trottier to
leave the Sunstone on the table to convince Nur-Ab-Sal.

You have two parts to a scary disguise here in the hotel room.

Use both the flashlight and the bed sheet to help you.

What kind of costume can you create with these two items?

Indy can pretend to be a ghost, but only if it's dark enough.

Look in the fuse box, and you'll find a switch that will turn out the lights.