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Launches a swarm of micro-missiles.

The Helstrum is a robotic launcher weapon that burst-fires four small homing missiles that explode and deal DmgFireSmall64.png Heat damage. This weapon accepts rifle mods.

It can be sold for Credits64.png 7,500.


This weapon deals primarily DmgImpactSmall64.png Impact damage.


  • High DmgImpactSmall64.png Impact damage – effective against shields.
  • Second highest status chance of all sentinel weapons, behind Cryotra.png Cryotra.
  • Shots explode in a 3 meter radius on impact with a surface or enemy.
    • Innate DmgFireSmall64.png Heat damage – effective against Cloned Flesh, Infested, and Infested Flesh.
    • Initial hit and explosion apply status separately.
    • Explosion does not need direct line of sight to deal damage and will penetrate walls.
  • Pinpoint accuracy.
  • Innate Madurai Pol.svg polarity.
  • Missiles will home in on a target that the sentinel aims at.



The Helstrum's blueprint can be purchased from Legs in Fortuna for ReputationBlackx64.png 10,000, requiring the rank of Old Mate with Solaris United. Note that this weapon also takes up one Sentinel inventory slot.

Manufacturing Requirements
Time: 24 hrs
Rush: Platinum64.png 25
MarketIcon.png Market Price: N/A Blueprint2.svg Blueprints Price: ReputationBlackx64.png 10,000


  • Fires in a quick 4-round burst, but then has a burst cycle time of 4 times the inverse of the Firing Rate, otherwise known as the Seconds Per Shot. The delay in seconds between the first shot of each burst = 4 / (modified firing rate), e.g. with a maxed Mod TT 20px.png Speed Trigger the cycle time is 4/(0.91 x (1 + 0.6)) = 2.75 seconds between bursts. The default rate is one burst every 4.4 seconds.
  • Missiles have homing properties, allowing the whole salvo to reliably hit small and/or agile targets such as Ospreys.
    • In the event the target dies before the missiles reach it, the missiles will continue to travel in a straight line.
    • Given the homing properties, it can accurately land hits even when equipped on a very long range companion like Diriga using Mod TT 20px.png Calculated Shot, however the long travel time in this situation can still cause difficulties since the enemy may have time to move and get a terrain obstacle between it and the missiles at a safe distance.
  • Note that MOAs will 'lose interest' in a target if the player does not continue to target it. This appears to happen faster than with other companions, with MOAs firing, on average, three bursts, and sentinels firing approximately five before losing interest.


  • Mod TT 20px.png Firestorm and Mod TT 20px.png Primed Firestorm will increase the small blast radius on impact, increasing it to almost 5 meters with the Primed version.
  • With the Helstrum's very low base damage/crit stats but good status chance, it can be built into an extremely effective Status Effect inflictor if raw damage-per-shot is ignored completely.
    • It is not difficult to have the Helstrum simultaneously surpass 100% status chance, have 2 additional elements (including both being combination elements by adding all four base element types) and then filling the remainder of available mod slots with the best multishot and fire rate mods you have available. Building for DmgRadiationSmall64.png Radiation and DmgViralSmall64.png Viral will allow for good crowd control and assist in boosting damage from Viral, but DmgCorrosiveSmall64.png Corrosive with DmgFireSmall64.png Heat for heavy armor removal and crowd control or DmgViralSmall64.png Viral with DmgFireSmall64.png Heat for a combination of armor removal, health damage boost, and crowd control are also good options.

Patch History[]

Update 30.9 (2021-11-11)

  • Fixed the Terminal Velocity Mod not applying projectile velocity changes to Sentinels using the Helstrum weapon.

Hotfix 29.1.2 (2020-09-22)

  • Fixed some Sentinel and Moa Weapon types not getting affected by Magazine related Mods (notably Helstrum).

Hotfix 28.0.2 (2020-06-11)

  • Fixed Helstrum missing from the Codex and an inability to Chat link it.

Update 28.0 (2020-06-11)

  • Introduced.

Last updated: Update 28.0 (2020-06-11)