Campaign mission
Mission 1: Mayhem
Mayhem is mission 1 of 16. The notes below are from guide write-ups cross-checked on 23 October 2026, not from a frame-by-frame capture.
From my notes. I lined this mission up against Game8's 16-mission order and the story beats that also appear in the ending and cast notes. For Mayhem I kept only the sentence I could point at a source. I left keypad codes, safe combinations and enemy health out.
What the sources agree on
Hajin is hit by an EMP and a full-scale invasion. The playable character is Park. Ju Kwon dies in the opening missile strike.
The reward listed for clearing Mayhem is Cho. Rewards are operator unlocks, cards or XP tokens depending on the mission. They are not a difficulty setting.
What I am not publishing
Collectible counts, checkpoint maps and trophy text were not re-read from the console lists. A guide that invents a route is worse than a short one. When a patch moves a safe, a printed code becomes a lie.
The full order sits on the mission index. Length ranges are on how long the campaign is. Spoilers for the last two missions are also on the ending page.
Questions
What number is Mayhem?
It is mission 1 of 16 in the Game8 order updated 20 October 2026. Activision has not posted its own public list.
What do you get for finishing Mayhem?
The listed reward is Cho.
Are the collectible locations here?
No. They were not re-verified, so they are omitted.
Keep reading
Sources checked 2026-10-23
- Call of Duty — Modern Warfare 4 — Modes, editions, platforms
- Wikipedia — Entity summary
- Steam store page — Price, size, reviews
Updated .