Peek-a-boo! - Call of Duty: Infinite Warfare

Kick open a door, peek open a door, and throw a grenade while peeking a door - 15

Peeking around a door is a new feature in the Call of Duty Franchise. When the player comes to an unlocked but closed door, the player has three options; Kick it down, take a peek or throw a grenade.

Kicking a door down will allow you to take the enemies by surprise.

Peeking around a door will allow you to see who is in the room, but enemies may be able to see you peeking.

While throwing a grenade into the room will kill enemies in that room, but there may be civilians in the room you may kill.

US Marines breaching a door by kicking it down