Description
Black Ops is back! Featuring gritty, grounded, fluid Multiplayer combat, the biggest Zombies offering ever with three full undead adventures at launch, and Blackout, where the universe of Black Ops comes to life in one massive battle royale experience.
© 2018-2019 Activision Publishing, Inc. ACTIVISION, CALL OF DUTY, CALL OF DUTY BLACK OPS, and the shield logo are trademarks of Activision Publishing, Inc. All other trademarks and trade names are property of their respective owners. This product contains software technology licensed from Id Software ("Id Technology"). Id Technology (c) 1999-2018 Id Software, Inc. Activision makes no guarantee regarding the availability of online play and may modify or discontinue online service without notice, including for example, ceasing online service for economic reasons due to a limited number of players continuing to make use of the service over time. The rating icon is a registered trademark of the Entertainment Software Association. 88229206US
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.