- "Veteran with limited HUD."
- — Call of Duty: Modern Warfare description.
- "The most challenging experience.
Enemies are lethal with deadly accuracy. The ultimate test of skill for coldblooded players."
- — Call of Duty: Black Ops Cold War description.
Realism functions identically to the Veteran difficulty, carrying the same damage and weapon mechanics. The only difference, however, is the limited HUD display. Gun display, grenade slots, ammunition value, and friendly NPC nametags are completely absent in this difficulty.