Description
From the makers of Sid Meier’s Civilization comes a game about civilization’s last stand. As the commander of an elite paramilitary organization known as XCOM, you control Earth’s defenses against a terrifying alien invasion.
XCOM: Enemy Unknown – The Complete Edition includes the Game of Year award-winning XCOM: Enemy Unknown, plus the critically-acclaimed expansion, XCOM: Enemy Within, and all of the released add-on content packaged together for an incredible value.
Features:
- Complete Edition Contents Include:
- XCOM: Enemy Unknown
- XCOM: Enemy Within
- Elite Soldier Pack add-on content
- Slingshot add-on content
- Second Wave add-on content
- STRATEGIC BASE: Detect and intercept the alien threat as you build and expand your XCOM headquarters. Recruit, customize and develop unique operatives, manage your personnel, and negotiate with governments around the world.
- TACTICAL COMBAT: Direct your squad in fierce turn-based ground battles, engage in covert operations, and rescue civilians in crowded cities and desolate outlands around the globe.
- RESEARCH ALIEN TECHNOLOGY: Recruit scientists and engineers to unlock more advanced weapons, armor and abilities.
- MULTIPLAYER: Mix and match aliens and humans, and combine abilities to outsmart and overpower your opponent in intense, one-on-one, turn-based matches.
© 1994-2013 Take-Two Interactive Software, Inc. Take-Two Interactive Software, Inc., 2K, 2K Games, Firaxis Games, XCOM, XCOM: Enemy Unknown, XCOM: Enemy Within, and their respective logos are trademarks of Take-Two Interactive Software, Inc. The ratings icon is a trademark of the Entertainment Software Association. All rights reserved. All other marks are property of their respective owners.
Steam 
Windows 
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.