Embark Studios’ Arc Raiders rewards patience, strategy, and exploration with its most coveted prizes: legendary blueprints and items. Unlike epic or common gear, these yellow-rarity treasures are intentionally rare, defining endgame power and offering unique gameplay advantages-from game-changing weapons to transformative attachments.
Many players mistakenly grind for hours, confusing epic loot for legendary gear. The truth is simple: there are only two core legendary items in Arc Raiders, and all legendary blueprints tie to specific bosses, events, or long-term projects. This guide breaks down every method to unlock all legendary ARC Raiders BluePrints and items, cutting through the grind and helping you claim your endgame rewards.
First: Understand Legendary Gear in Arc Raiders
Before diving into unlock methods, it’s critical to distinguish between legendary items and blueprints. Legendary items are rare, boss-exclusive components, while legendary blueprints are crafting recipes for top-tier weapons, attachments, and gadgets.
A key detail: Legendary items cannot be found in random containers or standard loot zones. Their drop rate from common sources is less than 1 in 100,000, making boss farming the only reliable way to obtain them. Similarly, legendary blueprints require targeted effort-they won’t spawn randomly during casual raids.
All legendary gear serves a purpose: legendary items are used to craft legendary weapons, while blueprints unlock permanent crafting recipes. Once learned, blueprints let you craft the item infinitely (with the right materials), making them a long-term investment.
Method 1: Farm Legendary Items (Reactors) from Endgame Bosses
There are exactly two legendary items in Arc Raiders: the Matriarch Reactor and the Queen Reactor. Both are dropped exclusively by endgame bosses in the Stella Montis underground facility and are required to craft the game’s most powerful weapons.
Matriarch Reactor (Legendary Item)
The Matriarch Reactor is dropped by the Matriarch boss, a high-difficulty enemy located in the Stella Montis underground facility. This boss only triggers after completing Northline Update progression or meeting specific raid conditions.
Farming the Matriarch is not a solo task-it requires a squad of 3+ players, high-level gear, and defensive augments. The boss has massive durability and lethal attacks, so coordination is critical.
Rewards for defeating the Matriarch include the Matriarch Reactor (used to craft the Aphelion legendary rifle) and the Aphelion blueprint itself. Note that the reactor is not a guaranteed drop, so repeated runs may be needed.
Queen Reactor (Legendary Item)
The Queen Reactor is dropped by the Queen boss, another extreme-difficulty enemy found in Stella Montis and during Harvester map conditions on Dam Battlegrounds, The Blue Gate, or Spaceport maps.
To trigger the Queen, you’ll need to complete specific Stella Montis quests or defeat enough minions to draw her out. Like the Matriarch, she requires a squad-her arsenal includes lethal area-of-effect attacks and heavy armor.
The Queen Reactor is used to craft two legendary weapons: the Equalizer pistol (a close-quarters powerhouse) and the Jupiter SMG (ideal for fast-paced combat). She also drops rare materials and the Equalizer/Jupiter blueprints occasionally.
Method 2: Unlock Legendary Blueprints via Map Events
Most legendary blueprints are tied to special map conditions or limited-time events, which boost drop rates and introduce unique loot containers. The Harvester and Close Scrutiny events are the most valuable for blueprint farming.
Harvester Event (Equalizer & Jupiter Blueprints)
The Harvester event is a map condition available on Dam Battlegrounds, The Blue Gate, or Spaceport. It features a mini-puzzle where players collect cells to unlock three large loot containers at the end.
These containers have a high chance to drop the Equalizer and Jupiter legendary blueprints-two of the most sought-after recipes in the game. The event also doubles trial quest points, making it a efficient way to multitask progress.
To complete the Harvester event, clear surrounding Arc enemies, collect cells from top platforms, and breach the final containers. Team up to avoid being overwhelmed by the Queen, who often spawns during this event.
Map Modifiers (Kinetic Converter & Anvil Splitter Blueprints)
Legendary attachment blueprints, like the Kinetic Converter and Anvil Splitter, are rare but can be farmed during specific map modifiers. Night Raid, Cold Snap, and Electromagnetic Storm all increase blueprint drop rates significantly.
The Kinetic Converter (a transformative stock attachment) has the highest spawn chance at the control tower in Dam Battlegrounds’ southeastern area, near the Research & Administration section. Look in lockers and containers at the top of the tower for the best odds.
The Anvil Splitter (a tech mod for the Anvil rifle) is commonly found in Buried City’s pharmacy building. This attachment converts the Anvil’s single heavy shot into four piercing projectiles, making it a game-changer for mid-range combat.
Method 3: Complete Long-Term Projects for Legendary Rewards
Arc Raiders’ permanent and limited-time projects offer guaranteed legendary blueprints and items for dedicated players. Two projects stand out: the Trophy Display Project and community events like the Candleberry Banquet.
Trophy Display Project (Permanent)
The Trophy Display Project is a five-stage, permanent challenge that tasks players with hunting Arc enemies and collecting specific machine parts. It has no fixed end date, so you can farm cheap ARC Raiders Materials at your own pace.
Later stages of the project reward legendary weapon blueprints, rare materials, and even a legendary weapon. For example, Stage 2 (Soaring Menaces) rewards the Vita Shot blueprint, while late stages unlock high-tier weapon recipes.
You can stockpile materials for future stages in your stash, so start farming early-focus on collecting Surveyor Vaults, Wasp Drivers, and Hornet Drivers for efficient progress.
Community Events (Limited-Time)
Limited-time events like Flickering Flames and its Candleberry Banquet project offer exclusive legendary rewards. The Flickering Flames event, which ran from December 2025 to January 2026, rewarded the Bettina III weapon and Kinetic Converter blueprint for completing its five stages.
These events require collecting event-specific materials (like Candleberries) and completing simple tasks. While past events have ended, Embark regularly introduces new ones-follow official announcements to avoid missing out on legendary rewards.
Pro Tips for Efficient Legendary Farming
Legendary gear requires patience, but these tips will speed up your progress and avoid frustration:
Team Up: Bosses like the Matriarch and Queen are nearly impossible to defeat solo. Coordinate with a squad via Discord or the Arc Raiders subreddit to clear high-difficulty content faster.
Prioritize High-Risk Zones: Locked rooms (accessible via keycards) and red-tier security areas have the highest blueprint drop rates. Focus on these locations during raids, especially during map modifiers like Night Raid.
Secure Extraction: Once you find a legendary blueprint or item, place it in a safe pocket to avoid losing it if you die. Plan your route to hit high-loot areas first, then head to extraction quickly.
Recycle Wisely: Legendary items like the Matriarch and Queen Reactors can be recycled for Power Rods and Magnetic Accelerators, but only do this if you already have enough to craft your desired weapons.
Common Mistakes to Avoid
Don’t Confuse Epic and Legendary: Epic gear is common, but legendary items are yellow-rarity and boss-exclusive. Don’t waste time looting common containers for legendary rewards-focus on bosses and events.
Don’t Rush Bosses: The Matriarch and Queen require high-level gear and coordination. Rushing into fights without a plan will result in repeated deaths and wasted time.
Don’t Skip Events: Limited-time events like Harvester and Flickering Flames are the only reliable way to get specific legendary blueprints. Missing these events means waiting for them to return.
Final Thoughts
Unlocking all legendary blueprints and items in Arc Raiders is a test of dedication, but the rewards are worth the grind. From the game-changing Aphelion rifle to the transformative Kinetic Converter, these treasures redefine endgame combat and make every raid more rewarding.
By focusing on boss farming, leveraging map events, and completing long-term projects, you’ll collect every legendary item and blueprint in no time. Remember to team up, prioritize high-risk zones, and stay updated on limited-time events to avoid missing out.
Whether you’re a casual raider or a dedicated endgame grinder, legendary gear is the ultimate symbol of progress in Arc Raiders. Follow this guide, stay consistent, and soon you’ll be dominating raids with the game’s most powerful tools.