Battlefield 4: Night Operations, Battlefield Wiki

Battlefield 4: Night Operations, also called Night Ops, is a free expansion and content update for Battlefield 4 that was released on September 1, 2015. The expansion includes a new nighttime map: Zavod: Graveyard Shift, a night version of Zavod 311 which has an emphasis on stealth and tactical gameplay. The expansion was released with the Summer 2015 Patch, which included tweaks to Battlefield 4's spotting mechanics, sound system, weapon balancing tweaks, a public server team balancer and more

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