On Saturday the Titanfall beta opened up to all Xbox One users, meaning a code was no longer needed to participate. Shortly after this announcement, Respawn Entertainment's co-founder, Vince Zampella, tweeted that the beta would soon open up to all PC users as well.
Confirming this on Sunday evening, Respawn Entertainment and the official Titanfall Twitter account tweeted that all PC users would indeed be given the liberty to participate in the Titanfall beta, however, there is one downfall. In order to take part in the beta on PC, you need to have previously signed up to participate. In other words, if you did not do so, you're out of luck; sign-ups are closed.
If you signed up for the beta before 4 PM PST on Saturday, you should be good to go. Simply start up Origin, access "My Games Library" and the beta should be visible. If you don't see it in your library, have no fear, it should pop up very soon.
The Titanfall beta will run until February 19 at 6 PM PST. That's just under three days people, so get your fix while you can.