475 kills with no per-weapon counter: the rule is to keep every new weapon until 25

Eleven weapon trophies: which biome each class appears in, which trait or alt fire solves each challenge, and why Full Arsenal and Soltari R&D demand picking up and firing everything you find.

Completing them unlocksFull Arsenal trophyFull ArsenalSilver11.10%

And it counts towards Soltari R&D, Enforcer, Relentless, Spread The Cost, Vicious Circle, All Shall Bow, Broadside, Atrophy, Angle Of Attack, Radiance, required for the platinum.

The EveryTrophy team2 min readPublished on 14/09/2026Updated on 14/09/2026Covers 11 of the 54 trophies

Full Arsenal and R&D: the pick-up-and-fire rule

Full Arsenal (11.1%) asks for every Main and Power Weapon and 25 kills with each: 15 Main and 4 Power Weapons, 475 kills. The trophy has a tracker on the list, but the game does not show kills per weapon. Hence the rule: every new weapon you find, keep it until 25. If unsure which is missing, use one and check whether the trophy progress rises. The weapon list is under Tutorials.

Soltari R&D (36.6%) asks for every trait and variant of a single weapon. Each class has 3 variants — Handcannons are Eruptor, Ricochet and Marksman — and 12 possible traits. For it to count you only need to pick up the weapon and fire it: no kills required, but you must actually shoot.

The two rules merge into one habit: pick up and fire every weapon you see, even if you will not keep it, and hold onto new ones until 25 kills. With that, both trophies fall without planning.

Key

The game does not show kills per weapon. Keep every new weapon until 25 kills; if unsure which is missing, use one and check whether the trophy counter rises.

The nine challenges, weapon by weapon

Handcannons, Enforcer (65.4%): damage 7 enemies in 5 seconds. Available from the start; a pack of Vessels, the floating tentacled enemies, does it.

Rifles, Relentless (79.5%): 50 consecutive hits. They autohit: you only have to stop shooting once the enemy is dead.

Shotgun, Spread The Cost (12.1%): 7 consecutive blasts with every pellet landing. From the Ancient Depths. Right up against a large enemy, like the Osteomaw. So few have it because almost nobody fires point-blank.

Crossbow, All Shall Bow (49.5%): 3 enemies in one shot. From the Blighted Marsh; the Repeater Crossbow's alt fire penetrates lined-up enemies.

Chakrams, Vicious Circle (36.5%): 4 enemies in 2 seconds. From Acolyte's Haven; the Split on Hit trait splits the disc into several.

Prominence, Broadside (51.8%): 5 kills in one blast. First Power Weapon, Shattered Rise: into the middle of a pack of Vessels.

Dispiritor, Atrophy (57.2%): 5 enemies at once. Second Power Weapon, Ancient Depths: releasing the trigger leaves vortexes where you shot. Spray the group and let go.

Nova Lance, Angle Of Attack (43.0%): one kill by ricochet. Third Power Weapon, Desecrated Fortress: aim at the wall beside an enemy.

Illumine, Radiance (33.8%): 3 enemies at once with the beam. Fourth Power Weapon, Cathedral; the Chaining Arc trait makes the beam jump between enemies.

The trophies involved

Each one links to its section inside the full Saros trophy guide.

Full ArsenalSilver11.10%
Unlock all Main and Power Weapons, and defeat 25 hostiles with each.
Original name: Full Arsenal
Soltari R&DSilver36.60%
Unlock and utilize all Traits and Variants of a Weapon.
Original name: Soltari R&D
EnforcerBronze65.40%
Damage 7 hostiles within 5 seconds with Handcannons.
Original name: Enforcer
RelentlessBronze79.50%
Land 50 consecutive shots on hostiles with Rifles.
Original name: Relentless
Spread The CostBronze12.10%
Land 7 consecutive Shotgun blasts with 100% pellet accuracy.
Original name: Spread The Cost
Vicious CircleBronze36.50%
Use Chakrams to damage 4 hostiles within 2 seconds.
Original name: Vicious Circle
All Shall BowBronze49.50%
Hit 3 hostiles at once with Crossbows.
Original name: All Shall Bow
BroadsideBronze51.80%
Defeat 5 hostiles with a single Prominence blast.
Original name: Broadside
AtrophyBronze57.20%
Damage 5 hostiles simultaneously with Dispiritor projectiles.
Original name: Atrophy
Angle Of AttackBronze43.00%
Defeat a hostile using a ricochet Nova Lance slug.
Original name: Angle Of Attack
RadianceBronze33.80%
Damage 3 hostiles simultaneously using the Illumine.
Original name: Radiance

Other Saros guides

Eight Overlords, three acts and a true ending you lose by finishing off the King
How each Overlord is fought, what each one unlocks — the modifiers after Bastion, the Grapple, the Parry — and the game's only decision: in the second King fight you have to go through the gate without finishing him.
The Shattered Descent solves the five biome challenges and the 33 expeditions: a single-bar boss
Untouchable, Vincible, War Within, the 33 expeditions and the 30 OverDrive kills share a stage: the third biome, short, no detours and Rhabdom. How to do each, with which modifiers and the cloud save as a safety net.
Nothing depends on luck: augments have fixed rooms and Halcyon is in surplus if you choose well at the chests
The eight progress trophies across cycles: when the Banyan Tree opens on each of its four occasions, what the seven Nightmare Gates give, how much Halcyon there is per biome and why Second Chance is the first purchase.
Blue is absorbed, red is parried, yellow corrupts: the three rules behind six trophies
Saros's mechanics trophies fall on their own once you understand the projectile colour code. When each tool unlocks, what Catch And Release requires before you try, and why dying is the first trophy.
Nine trophies that do not count towards the platinum: one per biome and five Alphas up close
Update 1.005.001 in June 2026 added Photo Mode and nine separate trophies. What to frame in each biome — no need to save the picture — and why Acolyte's Haven is the place for Alphas.