Difference between revisions of "Stealth"

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m (Stealth Score)
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''This page refers to the Stealth skill. You may have been looking for the Stealth armour [[ego]].''
 
''This page refers to the Stealth skill. You may have been looking for the Stealth armour [[ego]].''
  
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===Positive Factors===
 
===Positive Factors===
*[[Fly]]ing or levitating: +10
 
 
*[[Boots]]/[[barding]]/[[ring of stealth]]: +50
 
*[[Boots]]/[[barding]]/[[ring of stealth]]: +50
 
*[[Randart]]s that enhance stealth: +50 per +
 
*[[Randart]]s that enhance stealth: +50 per +
 
*[[Boots of the Assassin]]: +80 (Fixedart)  
 
*[[Boots of the Assassin]]: +80 (Fixedart)  
 
*The [[Shadow card]]: +80
 
*The [[Shadow card]]: +80
*Playing a [[felid]]: +20
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*Playing a [[felid]] : +20
*[[Demonspawn mutations#Nightstalker|Nightstalker mutation]]: +40 per rank
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*[[Demonspawn mutations#Nightstalker|Nightstalker mutation]]: +50 per rank
 
*[[Good mutations#Thin Skeletal Structure|Thin Skeletal Structure mutation]]: +25 per rank
 
*[[Good mutations#Thin Skeletal Structure|Thin Skeletal Structure mutation]]: +25 per rank
*[[Good mutations#Camouflage|Camouflage mutation]]: +40 per rank
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*[[Good mutations#Camouflage|Camouflage mutation]]: +50 per rank
*[[Jiyva mutations#Translucent Skin|Translucent Skin mutation]]: +20 at rank 2, +40 at rank 3
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*[[Jiyva mutations#Translucent Skin|Translucent Skin mutation]]: +15 per rank
 
*Playing a [[merfolk]] or [[octopode]] while in water: +50
 
*Playing a [[merfolk]] or [[octopode]] while in water: +50
 
*When under the effect of [[Umbra]]: Multiply by roughly 2 (The source affects this. If gained through [[Yredelemnul]] or [[Dithmenos]], the exact amount is dependent on piety.)
 
*When under the effect of [[Umbra]]: Multiply by roughly 2 (The source affects this. If gained through [[Yredelemnul]] or [[Dithmenos]], the exact amount is dependent on piety.)
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===Negative Factors===
 
===Negative Factors===
 
*Wearing armour: -2 × ([[Encumbrance rating]])<sup>2</sup> / 3
 
*Wearing armour: -2 × ([[Encumbrance rating]])<sup>2</sup> / 3
*Traveling through [[shallow water]]: Divide by 2
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*Traveling through [[shallow water]] (unless [[fly]]ing): Divide by 2
 
**[[Merfolk]], [[octopode]]s, [[naga]]s, [[ogre]]s, and [[troll]]s receive no water penalty.
 
**[[Merfolk]], [[octopode]]s, [[naga]]s, [[ogre]]s, and [[troll]]s receive no water penalty.
 
*[[Good mutations#Hooves|Hooves mutation]]: -(5 + 5 per rank) when not [[flying]] nor wearing boots.
 
*[[Good mutations#Hooves|Hooves mutation]]: -(5 + 5 per rank) when not [[flying]] nor wearing boots.
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*Wearing a [[ring of loudness]]: -50
 
*Wearing a [[ring of loudness]]: -50
 
*Randarts that reduce stealth: -50 per -
 
*Randarts that reduce stealth: -50 per -
 +
*Worshipping [[Qazlal]]: Stealth is multiplied by (200 - min(piety, 160)) / 170, so at piety 160 or higher your stealth is roughly divided by 4.
  
 
If your Stealth score is < 0, it is treated as though it were 0.
 
If your Stealth score is < 0, it is treated as though it were 0.
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==Stealth Aptitudes==
 
==Stealth Aptitudes==
From [[Dungeon Crawl]] [[Stone Soup]] [[0.12]] in-game documentation:
 
 
 
{{#invoke:Apt|skill_table|Stealth}}
 
{{#invoke:Apt|skill_table|Stealth}}
 
Grey [[draconian]]s get +2.
 
Grey [[draconian]]s get +2.

Revision as of 01:52, 28 April 2015

Version 0.16: This article may not be up to date for the latest stable release of Crawl.

This page refers to the Stealth skill. You may have been looking for the Stealth armour ego.

The Stealth skill is a representation of how well your character understands the art of moving silently. Until your adventurer blunders into the Dungeon and starts killing everything, most monsters spend their time sleeping or wandering about peacefully. It's only after they've caught sight of you that they try to kill you, and by taking precautions to remain unseen, you can avoid dangerous opponents or sneak up on the enemy and initiate combat by stabbing them for incredible amounts of damage. However, understanding the art of stealth is not the only factor in being stealthy; a nimble spriggan dressed in robes will almost always make less noise than a lumbering troll in gold dragon armour. A high Stealth skill would help minimize these handicaps, but in the end knights make terrible ninjas no matter what. As such, most character builds that involve wearing heavy armour ignore stealth entirely, but any other character type can benefit from avoiding fights that aren't in their favor.

Different characters will have different Stealth Scores, based on a wide variety of factors. Likewise, each monster has a Monster Awareness Score. Each time you move or perform an action, all monsters in your line of sight have a (Monster Awareness + 1) / (Your Stealth) chance of spotting you. Once they've spotted you, they'll only lose track of you once you've left their line of sight for a while; this occurs much sooner for mindless enemies than for intelligent ones.

Stealth Score

The measure of a character's stealthiness is its Stealth Score. This is determined by taking your character's Base Stealth Score (which is easily calculated), and then tacking on several modifiers to determine its final Stealth Score.

Your Base Stealth Score equals

(3 × Dexterity) + (Stealth skill × Stealth Factor)

While your Stealth Skill is your character's understanding of stealth, your Stealth Factor is how naturally stealthy your character's species is:

Your Stealth Factor is then modified by the following:

Once you've calculated your Base Stealth Score, two adjustments are made for special cases:

Finally, the following flat modifiers are applied. Some of these factors may look much larger numerically than the components of the Base Stealth Score, but the interaction between a high dexterity score, high Stealth skill level, and a good Stealth Factor can result in very large Base Stealth Scores before any modifiers get involved:

Positive Factors

Negative Factors

If your Stealth score is < 0, it is treated as though it were 0.

In-Game Display

Although you cannot display your exact Stealth Score, you can get an idea of it by pressing the % or @ buttons. You'll see a description of your stealthiness which correlates to the following Stealth Scores:

  • 0- 9: "Extremely unstealthy"
  • 10-29: "Very unstealthy"
  • 30-59: "Unstealthy"
  • 60-89: "Fairly stealthy"
  • 90-119: "Stealthy"
  • 120-159: "Quite stealthy"
  • 160-219: "Very stealthy"
  • 220-299: "Extremely stealthy"
  • 300-399: "Extraordinarily stealthy"
  • 400-519: "Incredibly stealthy"
  • 520+: "Uncannily stealthy"

Monster Awareness

Your chance of going unseen is a ratio between your Stealth Score and each monster's Monster Awareness Score + 1. Monster Awareness is equal to 10, modified as follows:

Positive Factors

  • Monster intelligence: +0 for plants/jellies/zombies, +4 for insects, +8 for animals, +12 for humanoids, +16 for highly intelligent monsters
  • Hit dice: +1 per HD
  • Sense invisible: +5
  • If the monster is wandering instead of sleeping: +15
  • Demons, the undead, holy beings, golems, and plants: +10

Negative Factors

  • Monsters under the effects of Ensorcelled Hibernation: -10
  • If the player is invisible and the monster can't see invisible, or can sense invisible and the distance between the monster and the player is greater than 4: -75

If Monster Awareness is < 0, it is treated as though it were 0.

Other Uses of the Stealth Skill

The most important additional effect of your Stealth skill is the role it plays in the calculations of stabbing bonuses. See the stabbing page for more information.

A high Stealth skill also contributes to your ability to open doors soundlessly. Each time you open a door, the chance of it making noise is:

1 in (Dexterity + Stealth)

Therefore, characters with skill in Stealth and high dexterity are much less likely to alert enemies while opening doors than those only skilled in Stealth.

Stealth Aptitudes

At Ba DE Dg Ds Dj Dr Fe Fo Gr Gh Gn HO Hu Ko Mf Mi Mu Na Op On Sp Te Tr Vp VS
2 0 3 0 0 -1 0 4 3 2 2 8 -1 1 4 2 -1 -1 5 4 -2 5 1 -5 5 3

Grey draconians get +2.

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