You can still find unused EA App (Origin) keys on "grey market" sites like G2A or Eneba. Once purchased, you simply redeem the code in the EA App to begin your download.
After redemption, the game will appear in your library for download. 2. The Fan-Run "R1Delta" Project download titanfall 1 for pc link
“Works perfectly. Better than the original. You’ll see.” You can still find unused EA App (Origin)