TL;DR
Caches do not sit at fixed map pins. Only 5 to 8 cache spawns are live in any single raid, pulled from a much larger pool, and the live ones announce themselves with sound rather than a marker. Learn the audio first, then route through the dense zones below. A standard Raider Cache ticks; a stormtime First Wave Cache hums. On Spaceport, run the two terminal buildings and the trench hatches. On Blue Gate, work the southern village around Raider's Refuge. On Buried City, stay central and skip the rim. Run light so you can clear zones fast and carry the blueprints back out.
Learn the cache sound before you learn the map
The most common mistake is treating cache farming as a memorization task. It is a listening task. A flat X-marks-the-spot list will send you to dead markers, because the game rotates which spawns are active every raid.
Two cache types matter here, and they sound different.
A Raider Cache is the everyday container. It spawns on every raid in any weather, and it emits a mechanical ticking whirr when it is live. Inside you get standard to uncommon gear, ammo, attachments and parts, healing items, and the real draw: weapon blueprints, including rare tiers.
A First Wave Cache, which players also call a Hurricane Cache, spawns only during an active hurricane weather event. It gives off a sharper electric hum that you can pick out from the regular tick once you know the difference. These are the high-value targets. Roughly 50 to 60 percent of them carry a blueprint, and the payouts skew toward the good purple drops like item:tempest, item:bobcat, and item:vulcano, plus the blue item:canto SMG blueprint. The catch is that they are rare on the map, surfacing at about one in every five to ten possible markers during a storm. Since the Flashpoint patch their spawn rate dropped, so expect a quiet first few minutes and pick up the pace as the raid develops.
Wind during a hurricane fights you on this. The storm noise masks the hum, and the audio radius is small to begin with: players report needing to be within roughly 15 meters before the hum becomes audible. Two settings changes pay off here. Switch the game's audio output to Stereo in the sound menu, which has fixed cache-detection trouble for a lot of players, and run headphones for directional awareness. With both in place you can sweep a building and hear a live cache before you see the crate.
For the current spawn-rate context behind these caches, see the Flashpoint meta snapshot.
Opening a cache
In normal weather you do not need a key item. Walk up to the crate and interact. The container is a large steel box, clearly bigger than the standard lockers and weapon cases, usually sitting in rubble and overgrown brush.
During a Cold Snap event the rules shift. Caches show up as bare locked chests with no foliage around them, and you breach them open instead of a clean interact. Still no key item, just the breach action. Cold Snap also raises how many spawns go live, so it is one of the better farming windows when it rolls around. The full ruleset for that event is in the Cold Snap patch notes.
Every cache awards 700 XP on open, regardless of type. That alone makes a clearing loop worth running even on a dry blueprint streak.
Spaceport routing
Spaceport rewards a clean loop more than any other map, because the spawns spread evenly and the landmarks are easy to chain.
Anchor your route on the two terminal buildings, the Arrival Building and the Departure Building. That central terminal area is the densest cluster, so it is where you spend the most listening time. From there, sweep the trench hatches and the elevated platforms nearby, then push through the fuel processing zones before you commit to an exit. Learn the hatch positions and the terminal interiors, and end your loop close to an extraction point so a full backpack of blueprints does not strand you.
Blue Gate routing
Blue Gate holds the single densest reliable cluster in the rotation, and it sits in the south.
The southern stretch around Raider's Refuge and the village packs several spawns into close range, so that is your primary farm. Build a loop that takes in Pilgrim's Peak, the highway collapse area beside it, the Ancient Fort, and Rapper's Glade, then check the Ventilation Shafts, Adon Wreckage, and the Gate Approach as you cycle back. Blue Gate also has the most key-locked and puzzle-locked rooms of any map, so if you are mixing weapon-case looting into your cache run, this is the map where the two activities overlap and one extended loop covers both.
Buried City routing
Buried City is the toughest cache map, and the fix is positioning, not patience. Caches here cluster in the center, and the edges rarely pay out, so farm the middle and skip the rim entirely.
Run a tight central circuit through the Hospital, the Town Hall, Plaza Rosa, and Space Travel. Those four cover the zones where spawns reliably appear. Working the outskirts wastes the clock you would rather spend listening through the dense interiors, so keep the loop compact and central and let the rotation come to you.
Reading the weather before you drop
Weather decides which game you are playing.
Clear weather is the baseline: Raider Caches only, interact to open, and the ticking is easiest to pick out with no storm noise fighting you. Hurricane weather flips on the First Wave Caches with their electric hum and blueprint-heavy loot, at the cost of harder detection. Cold Snap turns caches into breachable locked chests and bumps the live-spawn count, which makes it a strong farming window despite the breach step. Night raids pay out well too, so if one queues up, take the drop.
The blueprints you pull from caches map directly onto the weapon tier list, so prioritize the crates that drop the guns you actually want to build.
Loadout notes for cache runs
Cache farming is a mobility and carry-capacity problem more than a combat one. You want to clear zones fast, hear the ticks and hums between fights, and haul blueprints back to extraction without going over weight. A light, high-mobility looting loadout fits the job better than a heavy brawler kit. Build for movement and backpack space, keep your weapons reliable rather than maxed for raw damage, and let the route knowledge plus your ear do the heavy lifting. Caches reward the player who knows where to walk and what to listen for, not the one with the longest pin list.
The pure looter build is tuned for exactly this job: maximum carry weight and movement, minimal combat overhead.
Build: 077bae6f3961