In this approachable online real-time strategy game, you will create, command, and control your own constantly evolving empire as you gather forces to either conquer or cooperate with neighboring civilizations. Whether you're conquering enemy civilizations, teaming up with your neighbors to beat back the barbarian hordes, or building a thriving economy where your citizens live in the lap of luxury, you’ll be the guiding spirit in the evolution of an ancient civilization.
System Requirements:
A Windows Experience Index score of 3.0 or higher or...
At least a 2 gigahertz CPU
Microsoft Windows XP, Windows Vista, or Windows 7
128 MB video card
1 gigabyte (GB) total system RAM (2 GB is recommended for best performance)
3 GB of hard drive space
An Internet connection capable of downloading large (500 MB–2 GB) builds of the game
Participation Requirements:

The minimum age to register for the Beta in Microsoft Connect is 18. The Beta is English-only, offered in North American and European regions.
What should I expect from the Beta?

A Beta is not a polished, finished version of the game. By participating in the Beta, you have the opportunity to help discover bugs and make suggestions to make the game more fun! During the Beta, you will be given access to the exclusive Beta website. There, you can read more information about the game and participate in the Beta forums.
Before you sign up:

To participate in the Beta, you need a gamertag that connects to Xbox LIVE and the Games for Windows LIVE client. If you already have a Games for Windows – LIVE gamertag or an Xbox LIVE gamertag with a Silver or Gold account, you simply need to download the latest version of the Games for Windows – LIVE client. If you do not have a gamertag, you can create one online.
Download the client or create a gamertag
How to sign up:

Once you have a gamertag, please ensure you know the correct spelling (including spaces, if any) before signing up for the Beta using Microsoft Connect. When you arrive at the Microsoft Connect website, you will be asked to register and fill out a Beta application survey.
Click here to get started.
Sign in with your gamertag’s Windows Live ID if you are prompted to do so.
If you are not currently registered with Connect, you will need to do so at this time.
Complete the short questionnaire.
You will be contacted by email if you are selected to participate in the Beta.

If you encounter any issues when signing up in Connect, please contact MGS Beta Support