Fast answer: military crates and locked boxes are route checks, not brute-force containers. Read the prompt, carry only the keys your route can actually use, and leave if the box requirement does not match your inventory. Black Box is different: it is a high-value trade and research item tied to enemy Trampler kills, so do not sell or spend it without checking your next tech-tree node.
Field status: current public Early Access behavior. Key prompts, loot doors, and crate requirements can change between patches. If the live prompt disagrees with this guide, trust the prompt first and treat this page as the route discipline layer.
Military crates and locked boxes
How to open military crates
Approach the crate or box close enough to read the interaction prompt before moving cargo around. If it asks for a specific key, that is the requirement. If it does not show an interact prompt, do not waste time circling it under PvP pressure. Mark it as a missed route check and leave.
The mistake is carrying every possible key into every raid. Keys are dead cargo until they match a prompt, and dead cargo becomes expensive when another Trampler hears your stop. Use this basic check before opening a military crate or locked box:
| Prompt or object | What it means | Field rule |
|---|---|---|
| Military crate | High-risk loot container, usually worth checking if the area is controlled. | Clear angles first; do not open while the driver is blind. |
| Locked military box | Requires the matching key or current-build unlock condition. | If the prompt names a key you do not have, leave it. |
| Colored lock prompt | Blue, green, black, or another key color is being checked. | Spend the key only if the route can still extract. |
| No prompt | Wrong angle, decorative object, already looted state, or unsupported interaction. | Recheck once from a clean angle, then move. |
If your crew is still learning extraction timing, pair this with the SAND extraction guide. A locked crate is not progress if the dropship window is already compromised.
Where to find the box key
Do not plan around one permanent box-key coordinate. In the current public route logic, treat the box key as a loot-door route item: check guarded loot areas, locked-door paths, military containers, and high-value interiors, then record which prompt consumed or requested the key. If the key does not appear before the route turns loud, extract and reset instead of widening the search until you die.
Practical route: scout the POI, confirm the locked-box prompt, search nearby high-value containers, return to the Trampler with any key item, then reopen only after cargo and defense are staged. Solo players should avoid opening a box if the Trampler is parked badly or the engine smoke is visible across open dunes.
Black box and colored keys
Black box locations and uses
The site resource index tracks Black Box as a Noteworthy Resource used for trade or research tree progress. The current note places it near the destroyed reactor after defeating an enemy Trampler. That makes it a combat reward, not a casual crate pickup.
Before selling or spending a Black Box, check the Tech Tree Database. Multiple Landwehr, weapon, armor, and advanced compartment nodes list Black Box requirements. If your next unlock needs it, store it. If your crew is already past that branch and needs currency, then it becomes a trade decision.
| Black Box decision | Use it when | Do not use it when |
|---|---|---|
| Keep | Your next combat, armor, or advanced module node lists Black Box. | You are already blocked by different materials. |
| Trade | The tech branch is not Black Box-gated and you need currency now. | You have not checked the database after the latest patch. |
| Carry in raid | You are moving it toward extraction or storage. | You are still exploring optional POIs. |
Blue, green, and black keys
Colored keys should be treated as prompt-specific access items. Blue key goes to blue-lock prompts, green key goes to green-lock prompts, and black key goes to black-lock prompts only when the live UI confirms it. Do not spend a colored key on curiosity if the box is in a bad extraction position.
INFERRED: exact colored-key reward tables are build-sensitive. The durable rule is route order: confirm prompt, secure vehicle, open container, move reward to cargo, then decide whether the next locked object is worth another stop.
| Key type | Likely use case | Carry rule |
|---|---|---|
| Blue key | Blue-lock doors or boxes when the prompt asks for it. | Carry on blue-route checks; store otherwise. |
| Green key | Green-lock prompt, often searched as "where to use green key". | Use only after confirming the route can still extract. |
| Black key | Black-lock prompt or higher-risk locked loot check. | Do not gamble it on an exposed stop. |
| Box key | Generic locked-box requirement when the prompt names it. | Spend near the box; do not carry it across unrelated routes. |
FAQ
How do you open military crates in SAND: Raiders of Sophie?
Read the crate prompt and use the matching key or unlock condition shown by the current build. If no prompt appears after one clean recheck, move on.
Where can you get Black Box?
The current site resource note ties Black Box to the destroyed reactor area after defeating an enemy Trampler. Treat it as a combat reward and extract it quickly.
Where do you use the green key?
Use it only on a green-lock prompt. If the route is exposed or extraction is already risky, store the key and spend it on a cleaner run.