"How to redeem a code on Xbox console;

Press the Xbox button to open the guide, and then select Store.
Press the View button to open the side menu, and then select Redeem.
Enter the 25-character code, select Next, and then follow the prompts.

How to redeem a code from a PC or mobile browser; 

From a web browser, go to redeem.microsoft.com.
Enter the 25-character code, select Next, and then follow the prompts."

Buy Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Buy Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games UK)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Game EU)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Comments about Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Recharge Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US) - Online

Buy Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games UK)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Game EU)

Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Comments about Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US)

Recharge Command & Conquer Red Alert 3: Commander's Challenge (Xbox Games US) - Online

Information