Titanfall is once again free on Origin through EA's Game Time trial program. That means anyone who downloads and installs the game will have 48 hours to cram in as much Titanfall play time as humanly possible.
Back in June, EA actually kicked off the Origin Game Time program with Respawn's incredibly successful shooter. Sure, the download and install times were hell for a lot of people, but the 48-hour thing doesn't actually kick off until you start playing the game anyway. All you'll need is, of course, an Origin account to access Game Time.
Titanfall isn't the only title available right now via the program. In addition to the mech-tastic shooter, EA is also offering Plants vs. Zombies: Garden Warfare and Kingdoms of Amalur: Reckoning for free trial. Battlefield 4's Game Time recently just ended.