http://blogs.battlefield.com/2012/02/ge ... 3-mp-demo/
We’re happy to announce details regarding access to the Mass Effect 3 multiplayer demo for players who have activated their online pass for Battlefield 3. PlayStation 3, Xbox 360, and PC players who have activated their Battefield 3 online pass (PC players who have played online do not need an online pass) will have early access to the multiplayer portion of the Mass Effect 3 demo starting February 14th (normal access will begin on the 17th).
Be sure that you use the same EA.com log-in that you used to activate your Battlefield 3 online pass or that you use when signing into your Origin account when you sign into the Mass Effect 3 demo. And, if you want to be extra certain that you’ve got your access squared away, be sure that you’ve signed on to the Battlefield 3 multiplayer servers and have played a multiplayer match.
We know that you’ll be using the skills you’ve picked up on the Battlefield to kick some serious co-op butt. You can download the demo when it goes live on February 14th from the PlayStation Network Store, Xbox Live, and Origin. Make us proud out there!
Join the Mass Effect 3 multiplayer demo early on February 14th