Which current-gen game has been your favorite co-op experience?

For me, I'd have to say Dying Light. Me and a buddy marathoned the shit out of it with two tvs side by side. We played 40 hrs of it in about 55 hrs of real time. It was the little things in Dying Light that made it an awesome co-op experience like the challenges (loot, zombie kill count, and parkour races). What has been your favorite co-op game of the current console generation?

Edit: Honorable mention-Overcooked. My wife (doesn't like video games) got addicted to Overcooked and we beat it in one day. Such a fun, chaotic experience.