Name: Mysterium - Hidden Signs DLC (Steam)
Brand: Asmodee Digital
SKU: KT-22DBC5EC78
Price: 0.52 EUR
Availability: InStock

The haunted manor still holds a few secrets… In Hidden Signs, the first expansion for Mysterium, you must again try to clarify the circumstances of the ghost’s death. The plot thickens, as the psychics consider all-new leads: 6 suspects, 6 locations and 6 objects. To help them in this task, the ghost has 42 new vision cards with which to communicate more effectively. Return to the manor – your seat at the séance table awaits…

Redeem on Steam

You need a Steam account and the Steam app.

Step 1: Open Steam and sign in.
Step 2: Open the Games menu, then choose Activate a Product on Steam…
Step 3: Enter the key and follow the prompts.
Step 4: The game appears in your Library.

Steam's redeem page Full guide for Steam

Activation notes from the publisher

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "MY GAMES" tab and start downloading.