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Activision have released a blog post talking about a number of aspects of Call of Duty Infinite Warfare. One notable aspect is a campaign game mode called YOLO where when you get killed and the game restarts (your campaign progress restarts). This is sort of their take on the Black Ops 3 realistic difficulty where when you get shot you restart the level.

Here is what they said about the YOLO mode:

This mode is unlocked after beating the game on Specialist, and well you only live once. By that we mean genuine permadeath. If you die, you will start all the way back at the beginning of the entire game.