Where are the spy bases located?The spy bases are indeed the key to succeeding in this challenge, as you may have guessed. These are available all over the map, allowing you to come across them quite easily, and therefore not waste too much time in order to validate the challenge. When you have spotted one, you will only have to search a total of seven chests for the challenge to be validated. Note that it is not necessary to search these chests at the same base, and even less during the same game.
We have given you below the exact location of six spy bases. As you can see, some are close to a major city, while others are quite far away. You then have the choice of going to the one that suits you the most at the start of the game.