Description
Go underground to reveal the source of mysterious earthquakes threatening Thedas.
Enter the Deep Roads to battle monstrous darkspawn, bloodthirsty creatures that dwell beneath the surface of Thedas. Explore ancient dwarven ruins and cavernous dungeons infested with deadly enemies to find the cause of dangerous, worsening earthquakes. Descend deeper underground to discover a hidden world and face a powerful entity. In this new adventure, playable within the Dragon Age: Inquisition campaign, you will fight new adversaries, gain epic weapons and armor, and solve one of Thedas’ greatest mysteries.
*REQUIRES DRAGON AGE: INQUISITION FOR XBOX ONE (SOLD SEPARATELY).
© 2015 Electronic Arts Inc. Dragon Age is a trademark of EA International (Studio and Publishing) Ltd.
Steam 
How to activate your Steam key?
1. Open your Steam client. (If you don't have a Steam Client, you can install from here https://store.steampowered.com/about/)
2. Sign in to your Steam account. (If you don't have a Steam Account, you can create from here https://store.steampowered.com/join/)
3. Click “ADD A GAME” button which is at the bottom of the Steam Client.
4. Now select "Activate a product on Steam..."
5. Write or copy-paste your Steam key which you purchased from Gamesforpc.
6. Now your game is in your library.
7. Find your game in your library, select and click install to start your download.