Payday 3: 99 Boxes in Stealth Mode – Overkill Difficulty

Annanda Islam
By Annanda Islam
6 Min Read
Image Source: Deep Silver

Let’s take a look at how to complete 99 Boxes in stealth mode with overkill difficulty on Payday 3. Follow our step-by-step guide to complete this mission swiftly.

Payday 3 is an electrifying, action-packed video game that puts players in the shoes of cunning criminals, ready to execute elaborate heists with precision and style. In this thrilling sequel, gamers will immerse themselves in a world of high-stakes robberies, cutting-edge weaponry, and strategic teamwork as they work their way up the criminal underworld ladder.

One of the most adrenaline-pumping aspects of Payday 3 is the wide array of heists available for players to undertake. These heists range from meticulously planned bank robberies to intense, high-speed getaways. Each mission offers a unique set of challenges and requires players to think on their feet, adapt to unexpected obstacles, and, most importantly, come out victorious with the loot.

In this article, we will delve into one of the eight exhilarating heists featured in Payday 3, the 99 Boxes heist. We’ll provide you with an in-depth guide on how to master this action-packed heist, from the initial planning stages to executing the perfect getaway.

Read More: Payday 3: Easiest Way to Complete Road Rage Heist

99 Boxes Stealth Guide: Overkill Difficulty

Image Source: Deep Silver

Payday 3’s 99 Boxes mission is a formidable challenge in the world of high-stakes heists. Set on very hard difficulty, this guide will provide a step-by-step walkthrough for securing maximum loot and high-tech devices at their peak value. Whether you’re going solo or with a team, our concise instructions will help you master the intricacies of 99 Boxes with ease.

Here’s a step-by-step detailed guide for completing the 99 Boxes heist in Payday 3:

Note: This guide is on a solo approach, but completing the heist with a co-op partner or a full group can make it faster and easier.


Before starting the heist, consider visiting the Arms Dealer to purchase a zipline bag favor, which will come in handy during the mission. For your loadout, using the light ballistic armor lining is recommended.

Hacking the Phones

The first objective is to hack both phones carried by guards to gain access to the high-tech devices. Begin by locating and hacking the East phone and the West phone. You can do this without alerting the guards by carefully sneaking up to them and hacking their phones. If detected, allow the guard to escort you out, and then proceed to hack the phones.

Disabling the Security Cameras

Your next task is to disable the security cameras. While staying in stealth as much as possible, navigate through the facility to locate the camera room. Take out any guards you encounter quietly and tie up any civilians who might interfere. Turn off the cameras to maintain your stealth advantage.

Obtaining the Liquid Coolant

Search for the wooden boxes in the facility to find the liquid coolant. You’ll need to loot one of these boxes, which is usually behind a QR code-locked door. Interact with the QR code panel to unlock the box. Once you’ve obtained the liquid coolant, place it in the truck for later retrieval.

Hacking the High-Tech Components

Hack the computer using the QR code obtained earlier. This will spawn a zipline bag if you have followed the recommended setup. If not, you can locate the zipline bag somewhere near the back of the facility. Use the zipline to access the courtyards.

Looting the High-Tech Components

Inside the courtyards, locate the white containers. Two of these containers hold the high-tech components, while the others contain bags of cash. Focus on looting the high-tech components first. Interact with the QR code-locked container and complete the mini-game to unlock it. Take the high-tech component and bring it back to the truck.

Looting the Cash

If you’re aiming to grab all the loot for the achievement, start looting the bags of cash in the containers. These bags aren’t behind QR codes, so you can prepare them for a zipline run if you’ve prepped the zipline earlier. Alternatively, you can sneak them back and forth, but this takes more time.

Retrieving the Remaining High-Tech Component

Return to hacking the second high-tech component using the QR code. Complete the mini-game to unlock the container and grab the component. Place it in the truck with the other high-tech components.


You can break stealth without major consequences if you’ve completed both high-tech components at full value and are ready to finish the heist. Prepare for the escape by deploying a spike strip near the front of the map to stop police reinforcements. Defend the area briefly, then activate the spike strip. Once it’s deployed, leave the map to complete the heist successfully.

Following these steps should help you complete the 99 Boxes heist in Payday 3 and achieve both achievements related to securing the maximum amount of loot and high-tech devices. Good luck!

Annanda Islam is a passionate gamer and writer at GameRiv. With an innate passion for gaming, Annanda loves FPS action and RPG.