Battlefield 4 Is Now Free To Claim For Amazon Prime Subscribers, Grab It ASAP! We imagine this is the time of the year that Amazon really bolsters its Prime membership numbers, with people signing up in anticipation of its annual Prime Day event. To that end, Amazon Prime Day 2021 is right around the corner (it takes place June 21-22). Ahead the event, however, Amazon is serving up another treat for Prime members—a free copy of Battlefield 4 for PC. Claiming your copy is rather easy. Just head over to Amazon's Battlefield 4 promotion page, click the Claim Now button, and then grab (copy) the key and redeem it on your Origin account. You will be prompted to sign into your Amazon Prime account when you attempt to do this, if you are not already. And if you are not a Prime member, you will need to become one.