Difference between revisions of "Attacks of opportunity"

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{{crawlquote|When you move away from an enemy, they have a small (1/3) chance of taking advantage and launching a free attack. Repositioning and retreating is often still good, but keep an eye out for those extra attacks.}}
 
{{crawlquote|When you move away from an enemy, they have a small (1/3) chance of taking advantage and launching a free attack. Repositioning and retreating is often still good, but keep an eye out for those extra attacks.}}
  
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Adjacent enemies may trigger an '''attack of opportunity''' ('''AoO''') whenever you move; capable enemies of same or faster movement speed will have a 1/3 chance to get a free attack<ref>Slow attacking monsters lose a turn after an attack of opportunity, so you can get a tile after an [[ogre (monster)|ogre]] swings at you.</ref> when you do so, with the attack taking no [[time]] to execute.  
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'''Attacks of opportunity''' ('''AOO''', '''AOOp''') can trigger whenever you move away from an enemy in melee.
  
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Attacks of opportunity are for most intents and purposes equal to a regular melee attack, though many movement related [[attack flavour]]s (engulf, ensnare, constriction, trample, [[sleepcap|sleep]], certain [[distortion]] effects<ref>Although distortion-branded attacks of opportunity cannot [[blink]] or [[banish]] you, their chance to add extra damage rises in compensation. Compared to regular attacks, the chance of adding 1-7 damage rises from 35% to 47%, the chance of extra 3-26 damage goes up from 25% to 33%.</ref>, [[phantom]]'s ''blink with'', and [[blink frog]]'s ''blink'') don't trigger, and self-destructing enemies like [[lurking horror]]s and [[creeping inferno]]s won't blow up.
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==Useful Info==
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Whenever you move away from an enemy's melee attack range, and the monster would pursue, it has a 33% chance to trigger an attack of opportunity. This allows it to move and attack simultaneously. They can only occur if a monster would choose to pursue. Enemies with [[reaching]] attacks can make attacks of opportunity from 2 tiles away. Even if you are faster than the opponent, attacks of opportunity can still be made.
  
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==Avoiding==
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The time spent for this combined move is a single monster turn, but with a 50% chance for it to lose an extra 10% of a turn. If a monster attacks slower than it moves, or moves slower than the attacks, it takes time equal to the slower of the two actions.
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There are several situations when monsters won't be able to get free attacks on you:
 
  
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*Monsters that are slower than you don't get a free attack.
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Note that [[random energy]] does not apply whenever an attack of opportunity happens. However, if a monster would be eligible for an attack, but doesn't actually get one, random energy will apply.
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*[[Confused]], [[fear|fleeing]], or incapacitated ([[asleep]], [[constrict]]ed, caught in a [[web]] or [[net]]) monsters are unable to chase you.
 
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**Monsters that [[blind|cannot]] [[invisibility|see you]] cannot perform attacks of opportunity.
 
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*When swapping places with an [[disposition#Allied|allied]] monster, which gets in the way.
 
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*Even monsters with reaching attacks must be right next to you to launch a free attack. You can [[kite]] a [[gnoll (monster)|gnoll]] with a [[polearm]] or a [[snapping turtle]] absolutely safely as long as you have at least a tile of distance from them.
 
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*The player becomes immune to attacks of opportunity while performing [[Wu Jian|martial attacks]] or [[rampaging]].
 
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*[[Zin]]'s Sanctuary prevents attacks for players inside it. This protection is retroactive - if you were previously outside the area and moved inside, the Sanctuary still protects you.
 
  
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==Strategy==
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===Avoiding===
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Watch out! Enemies will gain the same amount of free attacks as a [[centaur (monster)|centaur]] chasing you from afar, and that is if they are the same speed as you. Always try to resposition (say, to a [[stair dancing|upstairs]]) ''before'' you get adjacent to them.
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The following conditions will prevent attacks of opportunity entirely:
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*If a monster would choose not to move or melee attack, it won't make attacks of opportunity. For example, a [[centaur (monster)|centaur]] will prefer to use its bow over a weak melee attack.
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*Monsters who cannot move or melee attack will not perform attacks of opportunity, so the following statuses stop them entirely:
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**Incapacitation: [[Asleep]], [[paralysed]], [[petrified]], or [[confused]]
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**Cannot move: [[Constrict]]ed, caught in a [[web]]/[[net]]
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**Cannot attack: [[Fear|Fleeing]]
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**Cannot see you: you are [[invisible]] to the attacker or the attacker is [[blind]]ed
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*If you swap places with an [[ally]], so that the ally blocks the monster's movement, you avoid an attack of opportunity.
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*[[Zin]]'s Sanctuary prevents all attacks. This protection is retroactive - if you were previously outside the area and moved inside, the Sanctuary still protects you.
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*You become immune to attacks of opportunity while performing [[Wu Jian|martial attacks]], [[rampaging]], or Serpent's Lash.
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*[[Translocation]]s don't count as movement, so you can use them safely.
  
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Should the player need to kite a dangerous monster, a variety of disengagement tools are at their disposal. Speed-enhancing effects like [[Swiftness]] (note that once it runs out, it slows you) or a [[potion of haste]] will negate the effects of opportunity attacks, and various Translocations like [[Blink]], [[Iskenderun's Mystic Blast]] or [[Dispersal]] act as an instant way of removing oneself from melee combat. Items like [[curare|curare darts]], [[scroll of butterflies]], or a [[phial of floods]] should also be considered for their disabling or displacing effects.
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Being faster than the monster can help you escape from a melee monster, but attacks of opportunity can still occur. For example, against a 100% speed monster, a [[haste]]d player can take at most 2 attacks of opportunity before escaping melee range.
  
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Players with access to summons or allies, like followers of [[Hepliaklqana]], can swap places with their companion to create a one-tile gap with the monster.
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==Strategy==
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Watch out! When retreating, a 100% speed enemy with AOO gets more attacks than an [[adder]] would without AOO. Always try to reposition (say, to a [[stair dancing|upstairs]]) ''before'' you get adjacent to them.
  
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==Notes==
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Should you need to retreat from a bad fight, your options are limited. Common ways to escape include:
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<references/>
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*Swapping places with a [[summon]] or other type of [[ally]]
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*Prevent the monster from moving: [[Throwing net]], [[BVC]], [[wand of roots]]
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*Translocating yourself away: [[Blink]], [[Passage of Golubria]], [[scroll of teleport]], [[scroll of blinking]]
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*Sending the monster away: [[Iskenderun's Mystic Blast]], [[Dispersal]] ([[Dispersal|spell]] and [[dispersal (brand)|darts]]), [[scroll of butterflies]], [[phial of floods]]
  
 
==History==
 
==History==
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*In [[0.31]], attacks of opportunity were reworked. Prior to this version:
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**Monsters didn't have a 50% chance to lose 0.1 of a turn after making an opportunity attack.
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**Monsters only made attacks of opportunity if you were ''adjacent'', not in ''melee range''. Therefore, monsters with [[reaching]] attacks couldn't make attacks of opportunity. Their AI would let you get 2 tiles away before chasing, thus invalidating opportunity attacks.
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**You were immune to attacks of opportunity if you moved faster than the monster.
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**Certain [[attack flavour]]s, such as [[engulf]], [[constrict]], and any effect that moved the player or monster, were disabled during attacks of opportunity.
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:Also, [[random energy]] was re-introduced in this version.
 
*Attacks of opportunity were introduced in [[0.29]], as a replacement for [[energy randomisation]].
 
*Attacks of opportunity were introduced in [[0.29]], as a replacement for [[energy randomisation]].
  
 
[[Category:Game mechanics]]
 
[[Category:Game mechanics]]

Latest revision as of 12:29, 22 March 2024

Version 0.31: This article is up to date for the latest stable release of Dungeon Crawl Stone Soup.
When you move away from an enemy, they have a small (1/3) chance of taking advantage and launching a free attack. Repositioning and retreating is often still good, but keep an eye out for those extra attacks.

Attacks of opportunity (AOO, AOOp) can trigger whenever you move away from an enemy in melee.

Useful Info

Whenever you move away from an enemy's melee attack range, and the monster would pursue, it has a 33% chance to trigger an attack of opportunity. This allows it to move and attack simultaneously. They can only occur if a monster would choose to pursue. Enemies with reaching attacks can make attacks of opportunity from 2 tiles away. Even if you are faster than the opponent, attacks of opportunity can still be made.

The time spent for this combined move is a single monster turn, but with a 50% chance for it to lose an extra 10% of a turn. If a monster attacks slower than it moves, or moves slower than the attacks, it takes time equal to the slower of the two actions.

Note that random energy does not apply whenever an attack of opportunity happens. However, if a monster would be eligible for an attack, but doesn't actually get one, random energy will apply.

Avoiding

The following conditions will prevent attacks of opportunity entirely:

  • If a monster would choose not to move or melee attack, it won't make attacks of opportunity. For example, a centaur will prefer to use its bow over a weak melee attack.
  • Monsters who cannot move or melee attack will not perform attacks of opportunity, so the following statuses stop them entirely:
  • If you swap places with an ally, so that the ally blocks the monster's movement, you avoid an attack of opportunity.
  • Zin's Sanctuary prevents all attacks. This protection is retroactive - if you were previously outside the area and moved inside, the Sanctuary still protects you.
  • You become immune to attacks of opportunity while performing martial attacks, rampaging, or Serpent's Lash.
  • Translocations don't count as movement, so you can use them safely.

Being faster than the monster can help you escape from a melee monster, but attacks of opportunity can still occur. For example, against a 100% speed monster, a hasted player can take at most 2 attacks of opportunity before escaping melee range.

Strategy

Watch out! When retreating, a 100% speed enemy with AOO gets more attacks than an adder would without AOO. Always try to reposition (say, to a upstairs) before you get adjacent to them.

Should you need to retreat from a bad fight, your options are limited. Common ways to escape include:

History

  • In 0.31, attacks of opportunity were reworked. Prior to this version:
    • Monsters didn't have a 50% chance to lose 0.1 of a turn after making an opportunity attack.
    • Monsters only made attacks of opportunity if you were adjacent, not in melee range. Therefore, monsters with reaching attacks couldn't make attacks of opportunity. Their AI would let you get 2 tiles away before chasing, thus invalidating opportunity attacks.
    • You were immune to attacks of opportunity if you moved faster than the monster.
    • Certain attack flavours, such as engulf, constrict, and any effect that moved the player or monster, were disabled during attacks of opportunity.
Also, random energy was re-introduced in this version.
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