The forth piece of DLC for Battlefield Hardline is currently free for download on PC and current and last-gen consoles.
You can download Battlefield Hardline: Betrayal free on PlayStation 4 and PlayStation 3 until July 12th with a PlayStation Plus account necessary to access its online features. It is also free for PC players via Origin for a limited time, and for Xbox Live gold members for both Xbox 360 and Xbox One. Non gold members can still purchase the DLC separately for $15.99 on Xbox platforms. In Betrayal you have just finished your Getaway (the third piece of DLC) from a heist and now you must determine who in your team is selling you out. It includes four new maps and numerous new weapons, even a sword.
You can check out the cinematic trailer for the DLC here, or our review for Battlefield Hardline when it came out in 2015.