https://www.polygon.com/2018/5/17/17365398/call-of-duty-black-ops-4-multiplayer-gameplay-trailer-video-watch-cod-blops4 >During its livestream reveal event today, Activision debuted the first look at Call of Duty: Black Ops 4’s multiplayer features. >That full-length trailer is above, but here are some highlights: swimming while using your weapon; lots of grappling hooks; remote explosives; crossbows that shoot out traps; sticky grenades that spawn additional grenades that can bounce off walls; and, most importantly, a dog.