https://store.steampowered.com/app/1358020/41_Hours/
41 Hours is a first-person shooter dramatic game that follows the narrative of Ethan, a workaholic scientist in search of his long-lost wife. The story is intriguing and it takes several surprising turns as it develops over 11 Chapters and 20 hours of gameplay.

INSTRUCTION FOR ACTIVATION:

1. You must download and install Steam http://steampowered.com/download/SteamInstall.msi
2. Log in to your account or register a new one.
3. Go to the "My Games" section and select "Activate via Steam ..." and enter the key received after payment.
4. After activation, the game will appear in the list of games (Library) and you can download it