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"This heavy-hitting Oseram weapon is ideal for use against Corroding enemies. It can fire Explosive Bolts and deal extra ranged damage after a successful melee attack."
―Inventory description

The Relentless Boltblaster is a very rare weapon in Horizon Forbidden West. It is a variant of the Boltblaster.

By default, it deals 10% more damage against enemies in the Corroded state.

It can be upgraded five times.

Acquisition details[]

Source Cost Sell Value (base) Sell Value (fully upgraded)
Dukkah 54 Hunting Medals MetalShardsTransparent 625 MetalShardsTransparent 1469

11 Braided Wire

2 Large Machine Core

1 Luminous Brainstem

1 Medium Machine Core

Ammo[]

Bolts Bolt HFW icon Explosive Bolts Explosive Bolt icon Advanced Bolts Advanced Bolt icon
Damage Damage-Icon Damage Damage-Icon Explosive Damage Explosive-Icon Damage Damage-Icon
Base 19 19 17 Locked
Level 1 20 20 18 Locked
Level 2 22 22 20 Locked
Level 3 24 24 22 39
Level 4 27 27 25 43
Level 5 31 31 28 49

Magazine capacity of 42 Bolts, 21 Explosive Bolts, or 35 Advanced Bolts before reloading.

Upgrade costs[]

Upgrade Cost Unlocks
Level 1
  • MetalShardsTransparent 127
  • 4 Braided Wire
  • 1 Medium Machine Core
  • 4 Small Machine Core
  • Increased damage
  • Perk: Overdraw Damage +15%
Level 2
  • Increased damage
  • Second coil unlocked
Level 3
  • Increased damage
  • Advanced Bolts unlocked
  • Perk: Melee Follow Up +15%
Level 4
  • Increased damage
  • Perk: Corroding Enemy Damage +25%
Level 5
  • Increased damage
  • Third coil unlocked
  • Perk: Melee Follow Up +40%
Horizon Forbidden West Weapons
Blastslings Adhesive Blastsling - Barrage Blastsling - Cloudburst Blastsling - Corrosive Blastsling - Explosive Blastsling - Frost Blastsling - Icefire Blastsling - Legacy's Reach - Nora Thunder Sling - Rampart Blastsling - Siege Blastsling - SkyhammerBS - Wings of the Ten
Boltblasters Brawlbreaker - Eternal VengeanceBS - Hammerburst Boltblaster - Icestorm Boltblaster - Plasma Boltblaster - Puncturing Boltblaster - Relentless Boltbaster - Shock Boltblaster - Skystrike Boltblaster - The Blast Forge
Heavy Weapons Acid Bomb Launcher - Acidspitter - Blaze Bomb Launcher - Bomb Launcher - Cluster Launcher - Coil Blaster - Deathbringer Gun - Disc Launcher - Fire Repeater - Firespitter - Frost Blaster - Inferno Blaster - Inferno Bomb Launcher - Mine Launcher - Plasma Bomb Launcher - Plasma Cannon - Plasma Spine Launcher - Pulse Cannon - Ravager Cannon - Shock Cannon - Spinetail Lancer - Stalker Dart Gun
Hunter Bows Berserker Hunter Bow - Death-Seeker's Shadow - Fire Hunter Bow - Frost Hunter Bow - Hunter Bow - Hunter Training Bow - Lightning Hunter Bow - Marshal Hunter Bow - Purgewater Hunter Bow - Pyre Hunter Bow - Seeker Hunter Bow - Slicing Hunter Bow - Strongarm Hunter Bow - Sun-Touched Hunter Bow - Sunshot Hunter Bow - Tears of the Land-god - The Emperor's ReignBS - The Sun Scourge - Toy BowBS - Vanguard Hunter Bow - Whisper Hunter Bow - Wildfire Hunter Bow
Melee Weapons Champion’s Spear - Nora Legacy Spear
Sharpshot Bows Blacktide Sharpshot BowBS - Cleaving Sharpshot Bow - Delta Sharpshot Bow - Exacting Sharpshot Bow - Forgefall - Glowblast Sharpshot Bow - Gravesinger's LamentBS - Hardweave Sharpshot Bow - Iriv's Downfall - Knockdown Sharpshot Bow - Kue's Sharpshot Bow - Piercing Sharpshot Bow - Regalla's Wrath - Sharpshot Bow - Warden Sharpshot Bow
Shredder Gauntlets Ancestor's Return - Boomer's Shredder Gauntlet - Distant ThunderBS - Ironeater Shredder Gauntlet - Piercing Shredder Gauntlet - Ripsteel Shredder Gauntlet - Slicing Shredder Gauntlet - Sunhawk Shredder Gauntlet - The Final Chapter - Thunderbolt Shredder Gauntlet
Special Specter GauntletBS
Spike Throwers Bellowblast Spike Thrower - Defiance - Glowblast Spike Thrower - Heartshatter Spike Thrower - Impact Spike Thrower - Last ArgumentBS - Prototype Spike Thrower - Pulverizing Spike Thrower - Scalding Spike Thrower - Spinthorn Spike Thrower - The Skykiller - Vindicator Spike Thrower
Ropecasters Anchor Ropecaster - Canister Ropecaster - Elite Canister Ropecaster - Elite Ropecaster - Eventide Ropecaster - Ropecaster - The Tie That BindsBS
Tripcasters All-Mother's Blessing - Beamwire Tripcaster - Delver Tripcaster - Explosive Tripcaster - Forgefire Tripcaster - Glowblast Tripcaster - Guardian Tripcaster - Perimeter Tripcaster - Shock Tripcaster - Tinker's Pride
Warrior Bows Acid Warrior Bow - Adhesive Warrior Bow - Carja Behemoth Short Bow - Carja's Bane - Deathrattle Warrior Bow - Eye of the StormBS - Firestorm Warrior Bow - Frostbite Warrior Bow - Melee Warrior Bow - Rain of Sparks - Renegade Warrior Bow - Shearing Warrior Bow - Shock Warrior Bow - Swift Warrior Bow - Warrior Bow
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