https://www.gamespot.com/articles/400-player-battle-royale-game-gets-a-teaser-traile/1100-6456852/

A new trailer for an upcoming Battle Royale game that promises to support 400 players in a multiplayer environment has been released, but unfortunately it doesn't deliver what we want to see. The trailer for Mavericks: Proving Grounds shows off some nice-looking visuals and environments, but, critically, it does not show any gameplay. 

Mavericks is in development at the new UK studio Automaton Games. The game was formerly known as Project X before getting its new name over the weekend during a PC Gamer event. Mavericks will have a 12km squared "living and breathing" world, the developer says. It also promises dynamic elements such as wildfire that spreads and more.