Are you an Amazon Prime member? If so, you can snag a free copy of Battlefield 4 on PC through Prime Gaming. Oorah, etc!
To get it, you'll need to be logged in to your Amazon account, pop over to the Prime Gaming microsite and a code will be sent for you to claim on Origin. The freebie will only be available until 21st June so you'll want to be Oscar Mike to the site quicklike.
I've delved back into the archives to see what Eurogamer's thoughts were on Battlefield 4 at the time of release and, shockingly, it's so far back that the game has actually been given a review score and not a badge. Ah, the memories. "Levolution" aside (remember that!) it scored 8/10, so pretty good!