In the Tech Mogul achievement for the 99 Boxes mission, your goal is to secure two high-tech devices at their highest value. Time is of the essence as the value of these devices degrades over time. Keep an eye on the degradation meter in the top left corner of your HUD; if it hits zero, you'll lose the chance to secure them at their maximum value.
Your first step is to locate the devices, which are randomly placed in secure containers. Planning a safe and quick extraction route is key. I recommend clearing out the warehouse before attempting the extraction, as this makes your task easier.
Using the right assets and tools can give you a significant advantage. If you've got the asset that slows down the loot's degradation, now's the time to use it. The Motion Sensor tool is also invaluable for tracking guard movements and avoiding detection.
If you're looking for an easier way to complete this challenge, focus on clearing out the warehouse. Start by getting the camera operator stuck — hack his radio, then melee him from behind. Next, deal with the guard inside. You can either eliminate him or get him stuck by throwing a knife at his feet and quickly retrieving it as soon as he notices it (watch for the red "!" indicator). Apply the same strategy to the guards outside and the additional guards on the West/East sides of the warehouse, though their locations can vary.
By following these steps and adapting to the game's dynamics, you can efficiently secure the high-tech devices and earn the Tech Mogul achievement. Remember, it's all about quick thinking, strategic planning, and a bit of luck.