XCOM: Enemy Unknown. Full collection (Steam key) @ RU

After purchase, you will receive a KEY to activate the specified software product.

From the creators of the Civilization Sid Meier - a game about the last hope of mankind. You are the commander of the elite paramilitary organization XCOM, which is trying to protect the Earth from an alien invasion.
“XCOM: Enemy Unknown. The Complete Collection is the most complete edition of the XCOM: Enemy Unknown game of the year, which includes the game itself, the long-awaited addition of XCOM: Enemy Within, as well as all the previously released sets in one set.

Game features:
STRATEGIC BASES: Build your XCOM bases, detect and intercept UFOs with them. Recruit, train and develop unique fighters, manage base personnel, and interact with governments around the world.
TACTICAL BATTLES: Manage your squad in fierce turn-based battles, participate in secret operations, rescue civilians in crowded cities and destroyed settlements around the world.
EXPLORE FOREIGN TECHNOLOGIES: recruit scientists and engineers to learn new weapons, armor, and get new opportunities.
MULTIPLAYER GAME: create from aliens and people mixed troops, combine their skills to outwit and defeat an opponent in fierce one-on-one turn-based battles.

Installation Instructions:
Download and install Steam (if not already installed);
Register an account on Steam or enter an existing one;
Go to the "My Games" section and select "Activate via Steam ...", read and accept the Steam Subscriber Agreement and enter the key received immediately after the payment;
After activation, the game will appear in the list of games and you can download it from Steam. The installation process (download) takes about 10-60 minutes (depending on the available Internet channel).