This game mode is a simple One In The Chamber mode with four heroes! We have Widowmaker, Hanzo, Ashe, and McCree. In true One In The Chamber spirit, you can melee opponents and store shots (until death). You also can customize how many kills you need to win, how long the match lasts, and how many kills (in one life) you need in order to get your ultimate. There is also an option which makes it so that each hero has their own kills (in one life) requirement for their ultimate. With that option enabled, you can change how many kills each hero needs (in one life)!
I'll look into uploading a video trailer for this game mode!