Agatha Christie - Hercule Poirot: The First Cases

*MISSABLE*

Chapter 8 - The Truth

This chapter sees you going to the Storeroom and findng the Hidden Room with Archibald. To unlock this achievement you need to make the proper deductions in the Archibald Mind Map in order to complete it. After inspecting all items in the Hidden Room, you'll need to make the following deductions:
 

• "Blood stains" + "Potential murder weapon"
• "Rose engraving" + "Unrecognizable symbol"
• "Military lighter" + "Major's lighter"

Talk to Archibald in the Storeroom about these deductions, and now you can make two more:
 

• "Archibald in the garden" + "Open window"
• "Archibald collected something" + "Major's knife is the murder weapon"

Talk to Archibald to unlock this achievement.