I Dare You

At the local meet of the Birmingham Adventure Players Society, you were discussing the usual old topics. "What I would like is to play a REAL adventure!" you exclaimed. "Really? Well, maybe we can fix that," said Lizzie, your best friend. "My aunt has an old house just outside Birmingham. How do you fancy playing a REAL adventure in that old house? She is away on holiday for a couple of weeks and I'm sure I can put something together for you." And so the challenge began.

Note: The game was distributed with sealed hint envelopes, without which progress is impossible.