Stealth Stalker

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"Activate a cloaking device based on Stalker technology to decrease visibility to enemies."

―Description

Stealth Stalker is an unlockable Valor Surge under the Infiltrator skill tree in Horizon Forbidden West. The first level is automatically unlocked when Low Profile, Quiet Movement, and Silent Strike+ are all unlocked. To trigger it, it costs 120, 228, and 480 Valor for each level.

Use[]

All levels allow Aloy to become invisible and nearly inaudible to enemies, though this effect is temporarily disabled by aiming a weapon or attacking, taking damage, or using a Silent Strike for 1 second, 4 seconds, and 5 seconds, respectively. The bonus damage increase applies to Impact, Explosive, and Elemental damage while Tear and elemental buildup remain unaffected.

Level 1
- Bonus damage against unaware targets: 20%
- Bonus Silent Strike damage: +50%
- Duration: 20 seconds

Level 2
- Bonus damage against unaware targets: 35%
- Bonus Silent Strike damage: +100%
- Duration: 35 seconds
Level 3
- Bonus damage against unaware targets: 50%
- Bonus Silent Strike damage: +200%
- Stealth kills restore 30 Valor while active, prolonging use
- Duration: 50 seconds

Horizon Forbidden West Skills
Hunter
Active Skills	Workbench Expert - Glide Targeting^BS - Machine Grapple Strike^BS
Passive Boosts	Ammo Expert - Concentration+ - Concentration Regen - Deep Concentration - Heavy Weapon+ - Stamina Regen - Valor Surge Master - Weapon Stamina+
Weapon Techniques	High Volley - Knockdown Shot - Spread Blast - Sustained Blast - Triple Notch - Ultra Shot
Valor Surges	Ranged Master - Powershots - Hunter's Mark^BS
Infiltrator
Active Skills	Sharpshot Expert^BS - Stealth Resonator^BS
Passive Boosts	Low Profile - Quiet Movement - Quiet Spear - Silent Strike+ - Silent Strike Gain - Silent Strike Heal - Smoke Bomb Capacity - Stealth Ranged+ - Stealth Tear+
Weapon Techniques	Braced Shot - Double Notch - Focused Shot
Valor Surges	Radial Blast - Stealth Stalker - Berserk Blast^BS
Machine Master
Active Skills	Override Subroutines - Flying Grapple Launch^BS - Resonator Refill^BS
Passive Boosts	Efficient Repair - Heavy Lifter - Lasting Override - Machine Damage - Machine Elemental+ - Machine Health - Mounted Archer - Mounted Defense
Weapon Techniques	Propelled Spike - Spike Trap - Splitting Spike
Valor Surges	Chain Burst - Part Breaker - Override Overdrive^BS
Survivor
Active Skills	Plant Forager - Low Health Stamina^BS - Shield Drop^BS
Passive Boosts	Low Health Defense - Low Health Melee - Low Health Ranged - Low Health Regen - Medicine Capacity - Potent Medicine - Potion Proficiency - Valor on Impact
Weapon Techniques	Bouncing Bombs - Burst Dodge - Power Shredder - Shredder Mine - Sticky Bomb - Triple Shredder
Valor Surges	Overshield - Toughened - Defy Death^BS
Trapper
Active Skills	Ropecaster Expert^BS - Smoke Bomb Heal^BS
Passive Boosts	Food Duration - Nimble Crafter - Quick Trapper - Resilient Trapper - Skilled Salvager - Trap Limit
Weapon Techniques	Penetrating Rope - Quick Wire
Valor Surges	Elemental Fury - Trap Specialist - Trap Mines^BS
Warrior
Active Skills	Aerial Slash/Jump-Off - Block Breaker - Energy Surge - Halfmoon Slash - Nora Warrior - Resonator Blast - Spinning Scythe - The Destroyer - Elemental Spear^BS - Warrior's Instinct^BS
Passive Boosts	Critical Strike+ - Energized Duration - Melee Damage - Power Attack+ - Resonator Blast+ - Resonator Buildup - Resonator Damage
Weapon Techniques	Burst Fire - Melee Detonator - Spread Shot
Valor Surges	Critical Boost - Melee Might - Warrior's Vigor
Other
Outfit/food only	Evader - Low Health Valor - Second Chance - Shard Salvager - Drop Shield Capacity^BS