Steps to get super awesome Mass Effect codes:
1. Create a Hotmail Account
2. Log into
http://expertzone.microsoft.com
3. Fill in whatever name/address you want then put in Wal-Mart as your store and Retail Sales Associate as your job title.
4. Use Walmart's store locator
http://www.walmart.com/storeLocator/ca_storefinder.do
To find your store's number and phone number
5. Submit your registration
6. Verify account through the e-mail you should get
7. Take Mass Effect 3 quiz on ExpertZones site by going to > Training and Resources > 360 > Xbox Games. You should see the quiz there.
8. After you complete the quiz, go back to the homepage and scroll through the panels in the slideshow and find the Mass Effect one to redeem your code.
Cheers!