Operation Watchman pairs a strict no-kill stealth run with a chaotic last stand, and failing any part sends you back to the very beginning. The mission has you slip into FOB Vibora without alerting anyone, meet Sam Fisher, then survive an endless wave of Unidad soldiers, heavy infantry, and helicopters while Sam finishes a hack. Get the load-out and the timing right and it becomes a repeatable sequence instead of a coin flip.
Quick answer: Start the mission between 21:00 and 04:00, infiltrate FOB Vibora without any kills or detection, speak to Sam Fisher upstairs in the main building, then hold the top floor with proximity mines and rebel support until his hack finishes and you can exfil to La Cruz Alpha.
Time window and load-out before you start
Operation Watchman can only be triggered between 21:00 and 04:00 in-game time. Failing and restarting does not reset the world clock, so if a run drags past 04:00 you will need to advance the time of day manually before you can attempt it again.

Two very different fights follow each other back to back, so bring gear that covers silent movement and heavy anti-vehicle firepower at the same time.
| Bring | Why it matters |
|---|---|
| Diversion Lures | Pull guards off checkpoints and doorways without killing them |
| Proximity Mines | Seal doorways during the defense phase |
| Diversion, Mortar, and Guns-for-Hire rebel skills | Rebel fighters handle enemies outside the building |
| HTI sniper rifle or underbarrel grenade launcher | One-shots helicopters and armored vehicles |
| M4A1 or another strong CQB weapon | Handles close-range assaults during the hold |
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Add to Google Preferences →Infiltrate FOB Vibora with zero kills or detection
The infiltration is the part players fail most. You cannot kill anyone and you cannot be spotted, so movement and lures do all the work. Drones are unavailable, so scout with your own eyes.

- One guard at the main entrance
- Snipers posted in the watch towers
- Guards inside the mess halls and armories to the left of the main building
- At least three guards patrolling the perimeter of the main building
- Occasionally a guard in the back room of the main building
Two shortcuts help if the stealth keeps failing. You can fly a helicopter through the base’s airspace and jump out before it gets shot down. If you keep getting spotted on the way down, clear the base a few in-game hours before the mission window begins so fewer patrols are active.
Note: Detection during the meeting cutscene still counts. Make sure no guard is walking up behind you before you trigger the conversation.
Hold the building during Sam’s hack
The moment you finish talking to Sam, the entire base goes on alert and the rules flip. Now you have to kill everyone and hold out until the hack completes. If you brought AI teammates, expect them to go down almost immediately, so plan to fight this solo.

Tip: If an alarm is active south of the building, take it out to reduce reinforcement pressure. The whole phase runs several minutes, so the goal is simply to survive until Sam is done.
Exfiltrate with Sam to La Cruz Alpha
When the hack finishes, you still have to get out. Hide long enough and the Unidad alert level drops, opening a window to slip away quietly.

The road to the extraction point is guarded by Unidad checkpoints. You can drive straight past them, but that is risky, so avoid them where possible or cut off-road. If you parked a helicopter near the FOB before starting, you can use it to escape instead. Sam is able to travel with you on the ground, though he has trouble reaching helicopters.
Reaching the hideout triggers a cutscene that ends the mission. You will know it worked when the Mission Complete screen appears for La Cruz and awards 1,500 XP for Operation: Watchman.

If a run keeps ending early, the cause is almost always one of a few things. A single kill or one detection during infiltration voids the run, a guard spotting you mid-cutscene fails it, dying during the hold restarts the whole mission, and getting caught out in the open on the drive out can undo the exfil. Reset the time of day if you push past 04:00, keep your mines and rebel skills ready, and the mission becomes a clean, repeatable sequence.






