Origin and FIFA 16 – How to Download a Legit Copy of FIFA 16 Without an Activation Key

I haven't installed Origin yet, but I would say it isn't even technically possible, short of reversing the game, Steamworks and the Origin interface.

Steam and Origin are different DRM systems with easily different interfaces between the game and the distribution system (i.e. ways for the program to ask "what's the user's avatar?", "does the user own this game?", "does the user have this DLC?", "please unlock this achievement", "please begin the purchase of this hat", etc.)

You can't just swap steamapp.dll for origindrm.dll (or whatever the relevant libraries are) and expect the program to work still.

The games could even be available in different versions between the two different platforms, so even just copy pasting the bulk of the game (levels, music, etc.) might be in vain.

In short, no, it's not possible.

Now, I'm not sure if this actually will work. But the only thing I would recommend to try is to uninstall and install again.

1. Open Origin
2. Right click on the Battlefield 3 cover in Origin
3. The option lowest in the drop menu should be "Uninstall". Click that.
4. When it have uninstalled, try reinstall completely from Origin, no disks.

To download from Origin:

1. Click on the cover of Battlefield 3.
2. A drop menu should appear, giving you the option to "Install".

I hope this will work for you :) And if it does, i wish you luck on the battlefield!