Thief - Modesty Denied - Score an epic 5,000,000 or more in a Challenge Map

This is easiest on the map "House of Bossoms" in the "Chain & Gain" Mode. This is a very small map with tons of loot items right next to each other.
Start by stealthily knocking out / killing all guards on the entire map. Taking out guards will deduct some points at first, but in reality it makes the whole process a lot easier and is the key to success. The goal in this challenge mode is to collect all the loot in very quick succession. The quicker you collect everything, the higher your multiplier and the more points you will get. With all of the guards out of the way, you can focus on the loot and collect it without any disturbance. The loot always spawns in the same place, so you can remember the locations. Again, the goal is to collect all the loot quickly without losing your multiplier. Simply go in every room, use focus vision for a short moment to highlight all objects and pick everything up. Then move on to the next area until you have a chain count of at least 150. This will pretty much guarantee more than 5 million points, as long as you pick everything up quickly enough and maintain your multiplier. This should take you 18-20 minutes.

Don't ever let your chain count break! It breaks if you haven't collected anything for a minute.

Once you've collected everything, go to the green door between the first and second floor. It will end the level and you will get a huge point boost for your high chain count. Before leaving you'll only have around 2 million points, but once you finish the map you'll more than double that due to the extra points.

Also keep in mind that almost all guards carry pockets. So be sure to loot all of them (after taking them out).