Walkthrough

Here's a guide to finishing the game.

Act 1:

• After the intro, take the Musket.
• Go to the Cave, take the Rock.
• Talk to Matthew, ask about the Snuffbox.
• Go to the Thicket, Wait three times, then go north.
• Inspect Body #2, take the Fife.
• Go to the Marsh, take the Mulberries. 
• Use the Musket on the Boy.
• Go to the River, approach the Girl. 
• Exhaust all options until Mother appears.
• Take the Carcass before leaving the River.
• Use the Carcass in the Thicket, take the Fur.
• Go to the Creek, ask Thomas to play the Fife.
• Go to the Mist, keep walking further in.
• Inspect the Effigy and People.
• Go to the Outcrop, use the Snuffbox and Mulberries on the Skeleton.
• Go to the Cave, give the Fur to Abigail.
• Go to the Brood, use the Shawl on the Insects.
• Go to the Ogon's Court and speak to it.
• Return to the Cave.

Act 2:

• [Optional] Let time expire. (Ending 1)
• [Optional] Go to the Ogon's Court, speak to it, take the Tooth, use it on one or all of the survivors before escaping. (Ending 2)
• Go back to the Cave, take the Finger.
• Go to the Outcrop, look at Matthew, take the Bible. 
• Go to the River, Wait until Elijah is distracted, use the Rock on him.
• Go to the Grove, use the Insignia on Thomas, take the Sabre.
• [Optional] Go to the Longhouse, receive the Totem from the Elder and place it on the Skeleton. (Ending 4)
• Go to the Ogon's Court, give it the Finger, Bible, Papers, Sabre, and finally Insignia.
• Escape.