MW4 Pacifist Achievement and Trophy Guide for ‘Assassins’ (All Door Codes)

On Xbox, the Gold Pacifist trophy in Call of Duty: Modern Warfare 4 is worth 50 Gamerscore. To earn it, play Mission 8, Assassins, as Supreme Leader Seung-ho and finish with precisely one enemy kill. One kill is scripted and unavoidable; spare every other palace guard, including the library guards and the sniper watching the pond. The game marks the trophy rare, with a 0.01 percent unlock rate. Once you learn the hiding spots, the route is manageable.

Quick answer: Play Assassins on Recruit, take down only the left guard at the boardroom doors, then sneak to the bunker using codes 5523, 7632, and 9103.

Pacifist rules: What counts as a kill in Assassins

The description reads “Complete ‘Assassins’ by only killing one enemy.” Only your own kills count toward that limit, and the conditions are short:

You can play on any difficulty. Recruit makes the task easiest, since guards take longer to notice you.
Kills by Ko, Shin, and Jang don’t add to your count.
Use your single kill on the guard positioned to the left of the boardroom entrance.
Once that kill is done, leave your firearm unused and avoid throwing knives and lethal grenades.
Bottles are fine. They distract guards without hurting them.
Restarting from a checkpoint after you’re spotted doesn’t break the run.
The campaign is solo only. There’s no co-op partner to help.

Save Revenge for a separate playthrough. After Shin’s death, that trophy requires eliminating every enemy on Hardened difficulty or above, so Pacifist fails immediately.

Assassins door codes: Library, kitchen, and bunker

When you reach each door, Ko broadcasts its code over the radio. The combinations stay fixed across runs, so enter them as soon as you arrive rather than waiting for his callout. Saving those seconds helps when a patrol is turning in your direction.

Door	Where it is	Code
Library service door	Top of the back library stairs	5523
Kitchen exit	Pantry door into the garden	7632
Bunker hatch	Stone recess behind the statue’s base	9103

Each keypad uses the [X] KEYPAD prompt. Earlier in the mission, Ko also resets the security room door to 0919 while you’re traveling with Shin, but your allies get you through that part.

Escort phase: Let your bodyguards do the fighting

Everything before the boardroom is an escort. Your allies handle every hostile, and your only job is to stay close, stay hidden when told, and keep your hands off the guards.

Follow Shin and Jang through the palace’s opening hallways. Don’t attack anyone, even enemies who come close.

Jang orders you to take cover in the flower-lined hallway. Press and hold Circle on PlayStation or B on Xbox to lie prone, then crawl beneath the display table on your right.

Stay under the table until Ko breaches the room, clears it, and pulls you out. Don’t move early.

Follow Ko through the museum display hall while crouched or prone. Copy his movements and give the guards and their flashlights plenty of room.

Climb out the window and shimmy along the outside ledge. Stop at the third window and wait until the guard inside passes and the red laser sights are gone.

Take the upper passage with your allies to the glass security room, then remain outside as they clear it. Once they’re done, collect the earpiece on the desk and accept the knife Ko gives you.

The knife is for one target only. Keep it away from every ordinary guard you see after this point.

The boardroom takedown: Your one allowed kill

Stay beside Shin as you approach the boardroom’s double doors. Three guards are inside when the doors swing open. Ko assigns the left-hand guard to you and says the other two are covered. Activate [RS] TAKEDOWN on that guard only.

Seung-ho performs the takedown on the left guard at the boardroom doors in Modern Warfare 4

The ambush includes Shin’s scripted death; it doesn’t affect the attempt. Your allowed kill has now been used. If anything you do from here on kills another enemy, immediately reload the latest checkpoint instead of continuing.

Solo stealth route from the library to the bunker

The gunfire alerts the palace, and from here you’re on your own. Ko stays on the radio, but nobody clears rooms for you anymore. Crouch everywhere unless you’re told otherwise.

Library (code 5523)

Crouch as you enter and keep tight to the left wall, using the bookshelves as cover. Drop prone if a guard gets close.

Crouching along the left side of the library bookshelves in the Assassins mission

Get to the back corner, beyond the patrol’s view, by crawling through the low gap under the bookshelves.

Take cover beneath the staircase at the rear right and stay put. Wait for all the patrolling guards to descend and pass you before moving.

Hiding under the back library stairs while guards walk down

Climb the wooden stairs to the locked service door and key in 5523. Beyond it is a corridor lit red.

Kitchen (code 7632)

The kitchen is the busiest indoor stretch. Patrols sweep through while you cross, and the stainless steel counters are your cover. Their open lower cabinets are big enough to crawl into, and guards will walk right past you.

Sprint down the red corridor and take the stairs down to the kitchen. Grab glass bottles from the crates by the kitchen doors on the way in.

Bottles near the kitchen entrance that can be thrown to distract guards

Turn right on entry and crawl into the counter’s lower opening. Two guards search the cabinets nearby; if they get too close, toss a bottle against a wall to draw them away.

Hiding inside a stainless steel kitchen counter while guards search

Enter the second kitchen room to activate a checkpoint. Three guards patrol the room. Use the middle route, then hide inside the counter at the opposite end until the area is empty.

Before stepping out of cover, look over the way to the exit. If one of the guards has yet to enter the kitchen, retreat and wait for him.

Throw a bottle away from the exit, then sneak through the counters to the far-right corner and out into the pantry.

The second kitchen room with the route to the pantry exit door

Enter 7632 on the pantry door keypad. It opens onto the garden.

Garden and pond

Outside, it’s raining and the sightlines are long. There are searchlights, armored patrols, and a sniper in the central gazebo. You can sprint straight for the bunker, and it’s possible, but it’s hard. The stealth route uses the hedges and the water and is far more reliable.

Crouch in the garden gate doorway until a four-guard patrol moves away to the right. Peeking around the frame is optional.

Waiting at the garden gate for the four-guard patrol to pass

Follow the patrol’s rearmost guard, then turn left into the hedge paths. Keep low and avoid the searchlights. The guards’ flashlights make their positions easy to follow.

Stay along the garden’s left edge and continue until you reach the pond.

Crouching through the hedge garden toward the pond

Enter the pond and hold Circle or B to submerge. Swim below the gazebo, staying underwater to avoid the sniper’s view.

Swimming underwater beneath the sniper's gazebo in the garden pond

Beyond the gazebo, briefly come up for air with X or A. Then submerge in the following water channel and swim in the direction of the large statue.

Climb out on the far side. Stay crouched and work through the flowerbeds and rounded hedges along the statue’s left side until you reach its rear.

Bunker hatch (code 9103)

Locate the keypad in the stone alcove behind the statue’s base. Before using it, wait until nobody is looking toward you; the game keeps running while you enter the code.

Key in 9103. This brings four enemies into view above you.

The bunker keypad behind the statue base in the Assassins mission

Slide down the yellow ladder the moment the hatch opens. Any hesitation gives the new guards time to catch you.

Sprint the full length of the underground tunnel to the metal blast doors at the end and push them open. Ignore the shouting overhead.

How to confirm Pacifist unlocked

The trophy pops as soon as the secure room doors open at the end of the tunnel. A cutscene starts with Seung-ho saying “Comrade Ko Jin-hyuk, thank you,” and a notification appears reading “MW4 – Pacifist” with the line “Complete ‘Assassins’ by only killing one enemy.” On Xbox it shows as a rare achievement worth 50 Gamerscore. On PlayStation it lands as a Gold trophy.

If the secure room appears but no trophy notification follows, you must have killed another enemy during the mission. Restart Assassins from the beginning, and keep the knife sheathed once you leave the boardroom.