The phrase "new gameplay" in simple terms means a fresh or different way of playing a game. It refers to unique game mechanics, features, or experiences that make a game feel novel and exciting. Full definition
Naughty Dog this morning released a brand new gameplay trailer for Uncharted 4: A Thief's End. (nextgengamingblog.com)
Now, it should be said that this isn't just Souls with robots — it's got a ton of new gameplay mechanics that seem like a breath of fresh air! (entertainmentbuddha.com)
They have also released a brand new gameplay video trailer. (brokenjoysticks.net)