When the players receive damage will mark visually. For example, if they are set on fire, players will see Jacob on fire, or if they are shot, it will appear a blood splash. While they lose health, the screen will lose color progressively from the corners. When their health is critically low, the screen will turn red.
It will happen the same with the partners. When they receive damage, it will be shown visually.
Players will know that they give damage in a similar way than when they receive it. When they shot or when they use a melee weapon, the enemies will show an animation that will represent pain regarding the damage. It also will be represented visually, like with blood splashes.