PS4 is now free as well. Might as well pick it up.
Battlefield 4™ Second Assault is one of five expansion packs included in Battlefield 4™ Premium.
Battlefield 4 Second Assault brings four fan-favorite maps, pushed to their limits with the power of Frostbite™ 3 and redesigned to enhance the way they play. Return to post-nuclear Paris two years later in Operation Metro 2014, featuring flooded subway tunnels and destructible ceilings. The walls of Caspian Border 2014 have been fortified with new vantage points, and players can now bring down its central communications tower. Operation Firestorm 2014 truly lives up to its name - the refinery’s pipelines can be breached to create flammable hazards across the map. Stay sharp as a sand storm rolls through Gulf of Oman 2014. Second Assault also equips players with five new weapons, an all-new vehicle, ten assignments, and the Capture the Flag game mode.
[XB1, PC] Free DLC - Battlefield 4 Second Assault @ Microsoft & Origin
Thanking you