Stealth

Stealth is a Dexterity-based Skill.

The higher a creature's Dexterity Score, the more likely they will succeed on Stealth Checks to stay hidden from enemies or other NPCs.

“

Stay out of sight. Melt into the shadows.

„

— In-game skill description

Proficiency

Characters who are proficient in Stealth can add their Proficiency Bonus when making  Ability checks.

The following backgrounds grant proficiency in Stealth:

•  Criminal
•  Urchin

The following races are proficient in Stealth:

•  Wood Elf
•  Wood Half-Elf

The following races have advantage in Stealth:

•  Lightfoot Halfling
•  Deep Gnome

The following classes can choose to select Stealth as a proficient skill at Level 1:

•  Bard
•  Monk
•  Ranger
•  Rogue

Uses

Hiding

Stealth is used to remain undetected while using  Hide within the line of sight of non-allied creatures. If a hiding character enters a non-allied creature's line of sight and is:

• In a  Clear Area or within melee range, they are spotted immediately, without a Stealth check.
•  Lightly Obscured, a Stealth check is made every turn, or every 6 seconds outside turn-based mode. The DC is the other creature's Passive Perception.
•  Heavily Obscured, a Stealth check is not made unless they get close to that creature.

When hiding within the range of a creature's  Darkvision or  Superior Darkvision:

•  Heavily Obscured creatures count as being  Lightly Obscured instead.
•  Lightly Obscured creatures count as being in a  Clear Area instead.

A character hiding outside all lines of sight is never spotted; Stealth checks are not made until entering the line of sight of a non-allied creature. Rolling a 1 is considered a Critical Failure and causes the character to be spotted immediately.

Stealth attacks

Not to be confused with Sneak Attack

Stealth checks enable a character to remain undetected after making a ranged attack from outside the line of sight of enemies. This does not require  Hiding, although doing so provides  Advantage on the attack roll and is therefore advisable anyway. Note that attacking immediately ends hiding, so undetected stealth attacks cannot be made while hiding within line of sight.

Once the player character performs the attack, if they are not in the line of sight (aka 'vision cone') of the target or any non-allied creature who could witness the attack, the character then performs a Stealth Check as shown in the combat log. This happens regardless of whether the attack hits or misses. The Stealth check has  Disadvantage by default and can be cancelled by having any source of  Advantage on the check.

The Difficulty Class (DC) is determined by a Perception check made by the target and / or witnesses, though this roll is not shown in the combat log; its result is merely shown as the DC of the subsequent Stealth check by the attacker. In other words, the attacker's Stealth contests the Perception of the target and / or witnesses. Due to a bug, the target will not benefit from Halfling Luck or Reliable Talent on this roll. Instead, they may get the effect of these if the attacker has any of these features.

If the check succeeds, the attacker will remain undetected and the target will begin searching for the source of the attack. For five turns, or 30 seconds if not in turn-based mode, after a successful check the target will have  Advantage on any subsequent Perception checks.

In what may be a bug, failing the check begins combat immediately, even if attacking the target would have otherwise lead to a "you have committed a crime" dialogue instead.

In what is very likely a bug, the raw result (before bonuses) of the Perception roll made by the target or witness often seems to equal the raw result of the subsequent Stealth check made by the attacker. This does not always happen, but happens much more frequently than would be expected by chance alone.

• This counter-stochastic behaviour is difficult to isolate via in-game testing, since the Perception roll is invisible, and its result is only shown with modifiers already applied: as the Difficulty Class of the Stealth Check made by the attacker.
• For example, when attacking Helsik from outside her line of sight, the Stealth Check in the combat log will often display a Difficulty Class and raw d20 result (before bonuses) such as: 14 vs. 11, 15 vs. 12, 21 vs. 18, and so on. This is because Helsik has a +3 bonus on Perception rolls from Wisdom, meaning the raw d20 results for her Perception roll and the player's Stealth roll are actually equal in these examples.
• At this time, this is presumed to be an intermittent bug which often causes the two d20 rolls to have the same result - a failure in the game's randomization logic.

Lines of sight of non-party creatures can be viewed by holding the Show Sneak Cones key; Left Shift by default. They can be manipulated using distractions such as  Minor Illusion or  Meow, which compel a creature to turn towards a specific direction and / or walk to another location, creating an opening for a stealth attack.

Invisibility

Stealth checks are used to maintain  Greater Invisibility when performing an action while under its effect. The Difficulty Class (DC) for this kind of check begins at 15, then becomes 17, then increases by 1 for each subsequent check.

• Outside of Honour mode, the DC scales linearly: $\text{DC}=15+(\text{number of previous successful Stealth checks})$
• In Honour mode, the DC scales quadratically: $\text{DC}=15+(\text{number of previous successful Stealth checks}{)}^2$

Actions with the Invisible flag can be performed without this Stealth check. They also do not increase the Stealth check DC of subsequent actions.

Related Items

+1 to Skill Checks

•  Drow Studded Leather Armour
•  Gloomstrand Shield
•  Leather Armour +1
•  Leather Armour +2
•  Scarlet Leather Armour
•  Shadeclinger Armour
•  Spidersilk Armour

+2 to Skill Checks

•  Smuggler's Ring

+3 to Skill Checks

•  Penumbral Armour while Obscured

+10 to Skill Checks

•  Ring of Shadows (via  Pass Without Trace)

+1d4 to All Skill Checks

•  Shapeshifter's Boon Ring while Shapeshifted or Disguised

Advantage on Skill Checks

•  Assassin's Shortsword
•  Elegant Studded Leather

Advantage on Skill Checks (bugged)

These items are described in-game as providing  Advantage on stealth checks while the wearer is Obscured, but are currently bugged; they always apply their bonus without any obscurity level checks, even if in a  Clear Area:

•  Dark Justiciar Half-Plate (Rare)
•  Dark Justiciar Half-Plate (Very Rare)
•  Viconia's Priestess Robe

Advantage on All Dexterity Checks

•  Resonance Stone
•  The Graceful Cloth

Disadvantage on Skill Checks

With the exception of the following items, all Heavy Armour and all variations of Scale Mail and Half Plate Armour provide  Disadvantage on Stealth checks.

•  Armour of Agility
•  Helldusk Armour
•  Protective Plate
•  Unwanted Masterwork Scalemail
•  Yuan-Ti Scale Mail
•  Sharpened Snare Cuirass

Related Spells

•  Astral Knowledge - grants Proficiency in all Skills of a chosen Ability
•  Bardic Inspiration - grants a +1d6 / +1d8 / +1d10 bonus on the next Skill Check
•  Bend Luck: Ability Check Bonus - grants a +1d4 bonus on all Skill Checks
•  Bend Luck: Ability Check Penalty - grants a +1d4 penalty on all Skill Checks
•  Bolstering Magic: Boon - grants a +1d4 bonus on all Skill Checks
•  Cat's Grace - grants Advantage on all Dexterity Checks
•  Cosmic Omen: Ability Check - grants a +1d6 bonus on all Skill Checks
•  Greater Invisibility - requires a succesful Stealth Check to remain Invisible after acting
•  Guidance - grants a +1d4 bonus on all Skill Checks
•  Hex (Dexterity) - grants Disadvantage on all Dexterity Checks
•  Knowledge of the Ages: Dexterity - grants Proficiency in all Dexterity Skills
•  Pass Without Trace - grants a +10 bonus to Stealth Checks