Origin are offering a week’s worth of free PC gameplay of Battlefield 4 as part of their “Origin Game Time”. Simply add the Game Time version of Battlefield 4 to your Origin account and once you start playing you will then have a week of play time before the offer expires.
Your Game Time clock runs in real-time, whether you’re in the fight or taking a break. but your progress and Origin Achievements will be saved if you want to keep your career going after your Game Time ends – buy the game and you’ll pick up right where you left off.
The download expires 14th August, so you must get the game before then.