How to farm hidden caches fast in Aliens: Fireteam Elite

[Windows Central]

Hidden caches are a great way to acquire all kinds of sweet loot, so here's the most efficient way to farm them.
Aliens: Fireteam Elite is supposed to be an endlessly replayable third-person shooter and part of that is down to its Challenge Card system. These can be obtained from the armory on Endeavor, or they can be found in hidden caches in the game's missions.

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