Battlefield 3 is currently free on EA's PC platform, Origin, and will remain so for the next week (until June 3). All you have to do is head to the store and sign up to claim your free copy. Despite the launch of Battlefield 4 last year, it's still a decent game and well worth checking out, especially at that price.
While we're on the subject of Battlefield, EA announced Battlefield: Hardline this week, a new branch of the franchise with a focus on the war between cops and criminals. We're expecting to see more of that at E3 next month.