COD MW4: How to Sneak Past on the Assassin Mission (Full Stealth Guide)
Learn how to sneak past on the Assassin mission in COD MW4 with door codes, patrol routes, and silent takedown tips for a clean Pacifist run.
Why the Assassin Mission Rewards Patience Over Firepower
If you're stuck on Mission 8 of the Modern Warfare 4 campaign, you already know the score: you start with no weapon, no armor, and a palace full of hostiles who want you dead. Learning how to sneak past on the assassin mission isn't optional — it's the entire point. This stealth-focused level in North Korea puts you in the shoes of Ri Seung Ho, the new Supreme Leader, and forces you to survive using cover, timing, and a handful of door codes instead of a rifle.
The good news? Once you understand the patrol patterns and the exact route, the mission becomes one of the most satisfying stealth sequences in the campaign. This guide breaks down how to sneak past on the assassin mission step by step, including every keypad code, the safest path through the gardens, and the tricks that make a one-kill Pacifist run achievable. Whether you're chasing achievements or just trying to survive on Veteran, the tips below will get you to the bunker without setting off every alarm in the building.
Assassin Mission at a Glance
Before diving into the route, here's the quick-reference overview of what you're dealing with.
| Detail | Info |
|---|---|
| Mission number | 8 (after Gone Dark, before Survivors) |
| Setting | North Korea — palace, gardens, bunker |
| Playable character | Ri Seung Ho (Leader Seung-ho) |
| Mission type | Stealth / escort |
| Key ally | Lt. Ko Jin-Hyuk (on comms) |
| Starting weapon | None (knife acquired later) |
| Multiplayer | Single-player only, no co-op |
| Difficulty levels | Recruit, Regular, Hardened, Veteran, Realism, YOLO |
The mission is linear but punishes recklessness. Sprinting, standing in open sightlines, and ignoring Ko's prompts are the three fastest ways to fail. Keep that in mind as you read the walkthrough below.
The Full Stealth Route, Objective by Objective
This section maps each pause-menu objective to the actual stealth behavior you need. If you want to know how to sneak past on the assassin mission reliably, treat this as your checklist.
Early Game: Stay With Your Guards and Hide
You begin in the palace corridors with bodyguards Shin and Jang. You have nothing to fight with, so your only job is to mirror their movements and follow Ko's instructions. When you reach the memorial hall, the game prompts you to go prone — lie flat behind the flower beds and wait for the attackers to pass. Do not peek, do not move early.
The Display Room: Crouch and Use Cover
The display room is dark, cluttered with exhibit cases and vases, and full of enemies. Crouch when prompted and move case to case. The cases break line of sight, so treat each one as a checkpoint. Rushing here is the most common early mistake.
Following Ko and Grabbing the Radio
Ko leads you out a window and across an exterior ledge in the rain — climb carefully behind him. You re-enter through a lobby and a red-lit corridor to the security room, where Ko holds off attackers. Pick up the earpiece from the security desk (this is the "radio" objective). From this point, Ko guides you by voice for the rest of the mission.
Follow Shin and Get Past the Library
Ko hands you a knife and sends you with Shin toward the bunker. He reads out the office door code: 0919. Follow Shin through the boardroom and halls. In the library — a two-floor room with staircases — Shin is killed, and Ko tells you to run because the gunshots were heard. Grab the Sang 9mm pistol from Shin and the PPSh-41 in the library if you want backup. The service door keypad code is 5523.
The Kitchen: Silent Kills Only
A red-lit service corridor leads to the kitchen, where throwing knives and glass bottles are your best friends. Use them for silent takedowns. The exit keypad code is 7632. Community reports note that when hiding under the kitchen counters for a Pacifist run, you should crouch rather than go prone — enemy detection is based on your character's face position, and crouching keeps your head higher and your body hidden.
The Gardens: Water Is Your Best Cover
This is where most players get caught. Soldiers with flashlights patrol among the stone lanterns, and a sniper watches from the gazebo over the pond. Ko tells you to use the water for cover. Swim when you need to, surface for air when prompted, and remember you can fire your pistol underwater. The pond is the safest route past the gazebo sniper.
Finding the Bunker and Reaching the Safe Room
The bunker entrance sits at the base of your father's statue, with a keypad code of 9103. Enter it in real time — so clear any alerted enemies first, or you'll get interrupted mid-typing. Then descend the ladder, follow the amber corridor, and reach the safe room to trigger the ending cutscene.
Every Door Code in One Table
Memorize these or keep this tab open. Ko reads each code aloud, but having them ready saves time.
| Location | Code |
|---|---|
| Office door (after Ko gives you the knife) | 0919 |
| Library service door | 5523 |
| Kitchen exit door | 7632 |
| Bunker keypad (base of father's statue) | 9103 |
Stealth Mechanics That Actually Matter
Understanding the underlying systems is what separates a clean run from a reload-fest. Here's what the game is actually checking.
| Mechanic | How It Works | Stealth Implication |
|---|---|---|
| Sprinting | Generates noise | Alerts nearby guards — walk when close |
| Crouching | Lowers profile, hides body | Best default stance in cover |
| Going prone | Lowest profile, slow movement | Use only when prompted or fully hidden |
| Face detection | Enemies detect based on head position | Crouch under counters, not prone |
| Throwing knives | Silent kills, limited ammo | Save for guards blocking your path |
| Glass bottles | Distraction / silent takedown tool | Great for pulling guards out of position |
| Underwater | You can fire a pistol | Makes the pond a safe highway |
Trophy and Achievement Strategy
If you're chasing 100%, the Assassin mission is home to two reported trophies from the datamined PlayStation list (not yet officially confirmed by Activision).
| Trophy | Rarity | Requirement | Best Approach |
|---|---|---|---|
| Pacifist | Gold | Complete the mission killing only one enemy | Use the pond route, crouch under counters, avoid all fights |
| Revenge | Silver | On Hardened+, kill every enemy after Shin dies | Reverse the stealth approach — clear each room methodically |
For Pacifist, the single kill you're forced into is the enemy Shin sets you up for. Everything else can be avoided with patience. For Revenge, note that after entering the bunker code, there are more enemies upstairs — don't go down the stairs immediately if you want the trophy.
Common Mistakes That Break Your Stealth Run
Even players who know how to sneak past on the assassin mission slip up on these. Here's what to avoid.
- Sprinting in the library or kitchen. The noise radius is generous to enemies and cruel to you.
- Typing codes with hostiles alerted. The bunker keypad is real-time, so clear the area first.
- Ignoring the far-left hedge line in the gardens. Player experience suggests the far-left edges have significantly fewer enemies than the center path.
- Going prone under kitchen counters. Crouch instead — face detection is the culprit.
- Wasting throwing knives early. Ammo is limited and the game warns you when it's gone.
- Firing the pistol above water near the gazebo. The sniper will hear it. Stay submerged.
Difficulty Considerations
The mission plays differently depending on your setting. Here's a rough comparison.
| Difficulty | Enemy Awareness | Recommended Style |
|---|---|---|
| Recruit / Regular | Forgiving, slower detection | Learn the route freely |
| Hardened | Sharper detection, trophy-eligible | Crouch-walk everywhere |
| Veteran | Punishing, fast alerts | Full stealth, no pistol unless necessary |
| Realism | Unlocked after campaign clear | Master the pond route |
| YOLO | Unlocked after Realism | One mistake ends the run |
For a deeper look at the campaign structure and official announcements, check the Call of Duty official site for updates on Modern Warfare 4.
Final Tips for a Clean Sneak
To wrap up: the assassin mission is a puzzle, not a firefight. Follow Ko's voice, keep your stance low, use the water, and treat every keypad as a moment to pause and scan. If you internalize the four codes and the pond route, you'll know exactly how to sneak past on the assassin mission on any difficulty — including a one-kill Pacifist run. Take your time, and the bunker will be waiting.
FAQ
How do I sneak past on the assassin mission without killing anyone? Use the pond for cover, crouch under kitchen counters instead of going prone, and avoid sprinting near guards. The only forced kill is the enemy Shin sets you up for, which is required for the Pacifist trophy anyway.
What are all the door codes in the Assassin mission? 0919 for the office door, 5523 for the library service door, 7632 for the kitchen exit, and 9103 for the bunker keypad at the base of your father's statue.
How do I get past the sniper in the gazebo? Swim through the pond. Ko tells you to use the water for cover, and you can fire your pistol underwater if you get spotted. Stay submerged and surface only when you need air.
Can I fail the stealth and still finish the mission? Yes — the mission doesn't hard-fail on detection, but alerted enemies make the real-time bunker keypad much harder to enter. Clearing threats before typing 9103 is the safest approach if you want to sneak past on the assassin mission consistently.