The Jupiter Blueprint in Arc Raiders is a legendary weapon blueprint tied to a single activity: the Harvester event. It does not drop from ordinary containers, surveyors, or standard high-value zones. To unlock Jupiter crafting permanently in your Workshop, you have to interact correctly with that event and successfully extract with the blueprint once it drops.
Quick answer: Jupiter only drops during Harvester events, from the three final high-value containers you unlock by completing the Harvester puzzle, and it can also appear as loot from the Queen’s core during the same event. Finish the Harvester, open those final containers or the Queen Core, pick up the blueprint, stash it in your safe pocket, and extract; then use “Learn And Consume” on the Jupiter Blueprint in the lobby to unlock the Jupiter recipe.
Jupiter Blueprint state: where it can and cannot drop
Jupiter is treated as a legendary weapon blueprint with tightly scoped drop conditions.
| Condition | Jupiter Blueprint drop state |
|---|---|
| Normal raids (no Harvester active) | Does not drop |
| Any map, containers outside Harvester event area | Does not drop |
| Harvester event active, three final Harvester containers | Can drop |
| Harvester event, Queen killed and Queen Core looted | Can drop |
In short, Jupiter is a Harvester-locked drop. The broader blueprint system does include container-type and map-condition logic, but those rules do not apply to Jupiter; it is bound to the event itself rather than to a container pool scattered across the maps.
Harvester event: conditions for Jupiter Blueprint drops
The Harvester event is the only event that rolls Jupiter in its loot tables. Two parts of the event can produce the blueprint.
1. Final Harvester puzzle containers
Completing the Harvester puzzle unlocks three final containers that hold high-value loot. These containers form the primary drop location for Jupiter. Once you solve the puzzle correctly and reach the payout room, you get exactly three end-chests that can roll legendary weapon blueprints, including Jupiter.
Jupiter behaves as a rare result inside that high-tier pool. It does not appear in every puzzle completion, but every legitimate Jupiter drop from containers so far has been from those three.
2. Queen Core loot
During the Harvester, the Queen ARC can spawn as part of the encounter. When the Queen dies, it leaves behind a large spherical object referred to as the Queen Core. Looting this core can also produce legendary blueprints. Jupiter is confirmed to roll here as well, alongside Equalizer and other high-end rewards.
Practically, this means any time the Harvester is active, you have two possible Jupiter sources in the same run: the locked puzzle payout and the Queen Core drop if the Queen is present, and you manage to kill and loot it.
How to complete Harvester correctly for Jupiter
The game does not require a specific loadout or progression rank to make Jupiter eligible; the trigger is simply “complete the Harvester event and open its final reward containers.” The way you execute the event affects only how safely you can do that.
Step 1: Enter a raid instance where the Harvester event is active. Check the map for the Harvester icon and move toward that location. Do not waste time on unrelated areas if your only goal is Jupiter.
Step 2: Approach the Harvester structure and start the event. Follow the event-specific interaction prompts to begin the puzzle phase. Maintain a low profile where possible; stealthy players regularly clear this with minimal gear by avoiding unnecessary fights.
Step 3: Solve the Harvester puzzle. The puzzle involves activating elements around the structure in a specific way; when it is solved correctly, the Harvester transitions into its reward state and grants access to the final containers. If the puzzle fails or times out, the containers will not unlock, and Jupiter cannot drop from them in that run.
Step 4: When the puzzle completes, locate the three final reward containers. Open as many as you can reach before other Raiders do. Jupiter and Equalizer both live in this set; Jupiter is generally more common, while Equalizer tends to appear in only one of the three chests per successful event.
Step 5: If the Queen has spawned, kill it and loot the Queen Core. Do this either before or after opening the puzzle containers, depending on the flow of the fight and enemy pressure. The core is a separate loot roll that can also grant Jupiter.
How to know the Jupiter Blueprint drop worked
Jupiter drops as an inventory item called “Jupiter Blueprint,” just like any other blueprint. To confirm a successful drop and unlock:
Step 1: After opening a final Harvester container or the Queen Core, watch the loot feed and your inventory grid for “Jupiter Blueprint.” If you miss the text, open your inventory immediately and scan your backpack and safe pocket slots.
Step 2: Move the Jupiter Blueprint into your safe pocket before leaving the event area. If your safe pocket is full or you are on a free kit with no safe pocket, you risk losing the blueprint on death. Rearrange items so the blueprint is always in a protected slot.
Step 3: Extract successfully from the raid. The blueprint is not learned on pickup; it is only preserved if you reach an extraction point alive while it is in your inventory, ideally in the safe pocket for safety against last-minute deaths.
Step 4: In the lobby, open your inventory, right-click “Jupiter Blueprint,” and select the option to learn and consume it. You will see a confirmation that the blueprint has been unlocked. After this, the blueprint item disappears and the Jupiter weapon recipe appears at Gunsmith 3 in your Workshop.
You can verify the unlock by opening the Workshop, switching to the gunsmith, and checking the legendary sniper section. Jupiter will show as craftable with its recipe requirements (Magnetic Accelerator, Complex Gun Parts, and a Queen Reactor) once the blueprint has been learned.
Why Harvester runs may not produce Jupiter
Harvester clears without a Jupiter drop are normal. The loot system stacks several random checks, so multiple successful events can still yield no legendary weapon blueprints.
The usual reasons for not seeing Jupiter after a run are:
- The puzzle was not fully completed. If the event destabilizes, aborts, or you leave early, the three final containers will not spawn and Jupiter cannot drop.
- The wrong containers were opened. Only the three final Harvester reward containers roll Jupiter and Equalizer. Ordinary crates and boxes around the site use standard loot tables and do not include these blueprints.
- The Queen was not killed or looted. If the Queen spawns but escapes, is left alive, or its core is not looted, you lose a valid Jupiter roll for that event.
- Other Raiders looted first. On non-hostile servers, other players can open the final containers or Queen Core before you. If they take the Jupiter Blueprint, you will not see it in your own inventory.
- Pure RNG. Even with correct completion and solo access to all three containers and the Queen Core, the game may simply choose other rewards.
If you want to minimize failed runs, prioritize clean puzzle solves, rapid access to all three chests, and securing the Queen Core whenever it appears. Use loadouts that give you mobility and survivability rather than expensive weapons you would be afraid to lose; the Harvester itself, not your gun power, is what gates Jupiter.
Once Jupiter is unlocked in your Workshop, you no longer need the blueprint. Future Harvester drops of Jupiter Blueprint are duplicates that you can trade, drop for other Raiders, or sell. The Harvester remains relevant for Equalizer and for Queen Reactors needed to craft Jupiter itself, but the blueprint unlock only has to happen once per Expedition.
