Enemies - Revision history

Mmarss: /* Expansions */ Update the expansion mechanics for 2.1, based on the FFF and editor-mode investigation

2026-11-14T20:52:22Z

Expansions: Update the expansion mechanics for 2.1, based on the FFF and editor-mode investigation

@@ Line 622: / Line 622: @@
 [[map generator|By default]], enemies on Nauvis and Gleba {{SA}} try to expand into "unclaimed" territory to create new bases.
-The game assigns a score to every [[Map structure#Chunk|chunk]] in a 7 chunk radius around existing spawners (euclidean distance). Only chunks with land are considered on Nauvis, and only chunks with marsh are considered on Gleba.
+The game maintains a list of expansion candidate [[Map structure#Chunk|chunks]], which typically includes any sufficiently free space near enemy spawners. These chunks are each assigned a score, and every 10 to 60 minutes (depending on map settings), one of these chunks is selected at random as the target for an expansion attempt. Then 5 to 20 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor. The values listed here are for default settings at the start of the game.
-Expansion score per chunk is 1.0 if there are no structures (player owned structures or spawners) within 3 chunks (taxi-cab distance). The score is penalized down to a minimum of 0.002 depending on the number of structures nearby. The exact formula is explained in [https://lua-api.factorio.com/latest/concepts/EnemyExpansionMapSettings.html EnemyExpansionMapSettings], <code>10/(10 + player structures in this chunk + player structures 1 chunk away / 2 + player structures 2 chunks away / 4 + 20 * enemy spawners in this chunk + 8 * enemy spawners 1 chunk away + 3.2 * enemy spawners 2 chunks away)</code>. Size and cost of structures does not matter, so pipes provide an exceptionally cheap method to lower expansion chances in certain areas.
+When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a nest or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any native unit can create any nest or worm that is native to the planet.
 * Biter spawners, spitter spawners and worms can only spawn on land tiles on Nauvis.
 * {{SA}} Egg rafts and small egg rafts can only spawn on marsh tiles on Gleba.
 * Medium worms, big worms and behemoth worms can only spawn when the evolution factor is over 0.3, 0.5, and 0.9 respectively. [https://gist.github.com/Bilka2/aa88490c23124a6f214c02c73a368aa7]
 ==Defense==

Izzabelle: /* Wrigglers {{SA}} */ small correction

2026-11-12T23:19:09Z

Wrigglers {{SA}}: small correction

← Older revision		Revision as of 23:19, 12 November 2026
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	\|-		\|-
	\| [[File:wriggler_big.png\|center]] \|\| Big wriggler		\| [[File:wriggler_big.png\|center]] \|\| Big wriggler
	\| The strongest and fastest of all wrigglers. Big premature wrigglers hatch from spoiled [[pentapod egg]]s ~~but will not be at full health when this happens~~.		\| The strongest and fastest of all wrigglers. Big premature wrigglers hatch from spoiled [[pentapod egg]]s.
	\|		\|
	* Planet: Gleba		* Planet: Gleba

Izzabelle: /* Wrigglers {{SA}} */ Updated damage and added regen values for normal wrigglers

2026-11-12T23:16:18Z

Wrigglers {{SA}}: Updated damage and added regen values for normal wrigglers

← Older revision		Revision as of 23:16, 12 November 2026
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	* Planet: Gleba		* Planet: Gleba
	* Health: 100		* Health: 100
	* Regeneration: -2/s		* Regeneration (normal): 0.2/s
			* Regeneration (premature): -2/s
	* Damage: 3.75 Physical + 3.75 Poison		* Damage: 3.75 Physical + 3.75 Poison
	* Range: 1.1		* Range: 1.1
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	* Planet: Gleba		* Planet: Gleba
	* Health: 200		* Health: 200
	* Regeneration: -4/s		* Regeneration (normal): 0.4/s
	* Damage: 5 Physical + 5 Poison		* Regeneration (premature): -4/s
			* Damage: 5.5 Physical + 5.5 Poison
	* Range: 1.4		* Range: 1.4
	* Speed: 38.9km/h		* Speed: 38.9km/h
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	* Planet: Gleba		* Planet: Gleba
	* Health: 400		* Health: 400
	* Regeneration: -8/s		* Regeneration (normal): 0.8/s
	* Damage: 8 Physical + 8 Poison		* Regeneration (premature): -8/s
			* Damage: 9 Physical + 9 Poison
	* Range: 1.8		* Range: 1.8
	* Speed: 43.2km/h		* Speed: 43.2km/h

Izzabelle: /* Stompers {{SA}} */ Added info about the stomp attack

2026-11-12T20:48:30Z

Stompers {{SA}}: Added info about the stomp attack

← Older revision		Revision as of 20:48, 12 November 2026
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Picture !! Name !! Info !! Stats !! ~~Acid splash~~ !! [[Damage#Resistance\|Resistances]]		! Picture !! Name !! Info !! Stats !! Attacks !! [[Damage#Resistance\|Resistances]]
	\|-		\|-
	\| [[File:stomper_small.png\|center]] \|\| Small stomper		\| [[File:stomper_small.png\|center]] \|\| Small stomper
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	* Regeneration: 7/s		* Regeneration: 7/s
	* Range: 5.8		* Range: 5.8
			* Shooting speed (acid splash): 1/s
	* Speed: 41.6 km/h		* Speed: 41.6 km/h
	\|		\|
			Acid splash:
	*Lifetime: 32 seconds		*Lifetime: 32 seconds
	*Applied effects (on contact):		*Applied effects (on contact):
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	**Movement speed: 60% speed		**Movement speed: 60% speed
	**Vehicle speed: 30% speed		**Vehicle speed: 30% speed
			**Vehicle friction: 150%
	*Damage (on contact): 1.5/s Acid		*Damage (on contact): 1.5/s Acid
	*Area of effect size: 1.58		*Area of effect size: 1.58
	**Damage: 0.5 Acid		**Damage: 0.5 Acid

			Stomp:
			*Area of effect size: 4.05
			**Damage: 43.75 Impact
	\|		\|
	*Impact: 80%		*Impact: 80%
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	* Regeneration: 16/s		* Regeneration: 16/s
	* Range: 7.8		* Range: 7.8
			* Shooting speed (acid splash): 1/s
	* Speed: 54.1km/h		* Speed: 54.1km/h
	\|		\|
			Acid splash:
	*Lifetime: 32 seconds		*Lifetime: 32 seconds
	*Applied effects (on contact):		*Applied effects (on contact):
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	**Movement speed: 60% speed		**Movement speed: 60% speed
	**Vehicle speed: 30% speed		**Vehicle speed: 30% speed
			**Vehicle friction: 150%
	*Damage (on contact): 6/s Acid		*Damage (on contact): 6/s Acid
	*Area of effect size: 2.1		*Area of effect size: 2.1
	**Damage: 1 Acid		**Damage: 1 Acid

			Stomp:
			*Area of effect size: 5.4
			**Damage: 87.5 Impact
	\|		\|
	*Impact: 80%		*Impact: 80%
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	* Regeneration: 30/s		* Regeneration: 30/s
	* Range: 10.4		* Range: 10.4
			* Shooting speed (acid splash): 1/s
	* Speed: 68.5km/h		* Speed: 68.5km/h
	\|		\|
			Acid splash:
	*Lifetime: 32 seconds		*Lifetime: 32 seconds
	*Applied effects (on contact):		*Applied effects (on contact):
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	**Movement speed: 60% speed		**Movement speed: 60% speed
	**Vehicle speed: 30% speed		**Vehicle speed: 30% speed
			**Vehicle friction: 150%
	*Damage (on contact): 15.36/s Acid		*Damage (on contact): 15.36/s Acid
	*Area of effect size: 2.8		*Area of effect size: 2.8
	**Damage: 1.6 Acid		**Damage: 1.6 Acid

			Stomp:
			*Area of effect size: 7.2
			**Damage: 140 Impact
	\|		\|
	*Impact: 80%		*Impact: 80%

Izzabelle: /* Demolishers {{SA}} */ Added info about demolisher fissures

2026-11-12T19:56:01Z

Demolishers {{SA}}: Added info about demolisher fissures

← Older revision		Revision as of 19:56, 12 November 2026
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	[[File:Demolisher_territory.png\|thumb\|300px\|right\|Small demolisher territory.]] Native to the planet Vulcanus, demolishers are massive worm-like creatures that roam across the land and lava. Each individual demolisher patrols a defined territory, and building structures in their territory will disturb them and cause them to attack. In [[peaceful mode]], demolishers will not seek out buildings, but they still roam freely in their territory and may accidentally hit buildings.		[[File:Demolisher_territory.png\|thumb\|300px\|right\|Small demolisher territory.]] Native to the planet Vulcanus, demolishers are massive worm-like creatures that roam across the land and lava. Each individual demolisher patrols a defined territory, and building structures in their territory will disturb them and cause them to attack. In [[peaceful mode]], demolishers will not seek out buildings, but they still roam freely in their territory and may accidentally hit buildings.

	Demolishers have three types of offense. On physical contact they do high damage to the player, and instantly destroy buildings and cliffs. They release a smoke cloud that slows the player, forces them to land if they are wearing [[mech armor]], and damages any nearby bots. At range, they cause ~~explosions~~ to erupt from the ground. Due to their high damage resistances and extremely fast health regeneration, killing them requires advanced and upgraded weaponry, or massive quantities of bullets. They can also coil around the player to prevent them from escaping, and are completely immune to the [[slowdown capsule\|slowdown capsule's]] effect.		Demolishers have three types of offense. On physical contact they do high damage to the player, and instantly destroy buildings and cliffs. They release a smoke cloud that slows the player, forces them to land if they are wearing [[mech armor]], and damages any nearby bots. At range, they cause explosive fissures to erupt from the ground at a rate of roughly 3 per second, each with a 1.25 second delay before they deal damage. Due to their high damage resistances and extremely fast health regeneration, killing them requires advanced and upgraded weaponry, or massive quantities of bullets. They can also coil around the player to prevent them from escaping, and are completely immune to the [[slowdown capsule\|slowdown capsule's]] effect.

	Once killed, they leave behind their shells, which contain [[tungsten ore]]. The cloud also persists for some time.		Once killed, they leave behind their shells, which contain [[tungsten ore]]. The cloud also persists for some time.
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Picture !! Name !! Info !! Stats !! [[Damage#Resistance\|Resistances]]		! Picture !! Name !! Info !! Stats !! Fissure damage !! [[Damage#Resistance\|Resistances]]
	\|-		\|-
	\| [[File:demolisher_small.png\|center]] \|\| Small demolisher		\| [[File:demolisher_small.png\|center]] \|\| Small demolisher
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	* Health: 30000		* Health: 30000
	* Regeneration: 2400/s		* Regeneration: 2400/s
			\|
			*Within 1 radius: 500 Explosion + 400 Fire
			*Within 2 radius: 75 Explosion + 75 Fire
			*Within 3.5 radius: 50 Fire
	\|		\|
	*Electric: 20/20%		*Electric: 20/20%
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	* Health: 100000		* Health: 100000
	* Regeneration: 7800/s		* Regeneration: 7800/s
			\|
			*Within 1.5 radius: 750 Explosion + 500 Fire
			*Within 3 radius: 112.5 Explosion + 112.5 Fire
			*Within 5.25 radius: 75 Fire
	\|		\|
	*Electric: 20/20%		*Electric: 20/20%
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	* Health: 300000		* Health: 300000
	* Regeneration: 24000/s		* Regeneration: 24000/s
			\|
			*Within 2 radius: 1250 Explosion + 1000 Fire
			*Within 4 radius: 187.5 Explosion + 187.5 Fire
			*Within 7 radius: 125 Fire
	\|		\|
	*Electric: 20/20%		*Electric: 20/20%
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	*Poison: 10% (head), 50% (body)		*Poison: 10% (head), 50% (body)
	\|}		\|}
			Note that each radius damage is applied separately, for example being within 2 radius of a small demolisher's fissure means taking 75 Explosion + 75 Fire damage ''and'' 50 Fire damage.

	=== Nests ===		=== Nests ===

Izzabelle: /* Nests */ Added counts of eggs dropped

2026-11-12T19:01:47Z

Nests: Added counts of eggs dropped

← Older revision		Revision as of 19:01, 12 November 2026
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	\|		\|
	* Planet: Gleba		* Planet: Gleba
	* Spawns a horde of premature wrigglers and drops [[pentapod egg]]s when destroyed.		* Spawns a horde of premature wrigglers and drops 9 [[pentapod egg]]s when destroyed.
	* Health: 500 (5000 at max evolution)		* Health: 500 (5000 at max evolution)
	* Regeneration: 10/s		* Regeneration: 10/s
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	\|		\|
	* Planet: Gleba		* Planet: Gleba
	* Spawns a horde of premature wrigglers and drops [[pentapod egg]]s when destroyed.		* Spawns a horde of premature wrigglers and drops 1-3 [[pentapod egg]]s when destroyed.
	* Health: 100 (1000 at max evolution)		* Health: 100 (1000 at max evolution)
	* Regeneration: 5/s		* Regeneration: 5/s

Bilka: /* Expansions */ Updated expansion group values for 2.1

2026-11-12T10:53:36Z

Expansions: Updated expansion group values for 2.1

← Older revision		Revision as of 10:53, 12 November 2026
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	Expansion score per chunk is 1.0 if there are no structures (player owned structures or spawners) within 3 chunks (taxi-cab distance). The score is penalized down to a minimum of 0.002 depending on the number of structures nearby. The exact formula is explained in [https://lua-api.factorio.com/latest/concepts/EnemyExpansionMapSettings.html EnemyExpansionMapSettings], <code>10/(10 + player structures in this chunk + player structures 1 chunk away / 2 + player structures 2 chunks away / 4 + 20 * enemy spawners in this chunk + 8 * enemy spawners 1 chunk away + 3.2 * enemy spawners 2 chunks away)</code>. Size and cost of structures does not matter, so pipes provide an exceptionally cheap method to lower expansion chances in certain areas.		Expansion score per chunk is 1.0 if there are no structures (player owned structures or spawners) within 3 chunks (taxi-cab distance). The score is penalized down to a minimum of 0.002 depending on the number of structures nearby. The exact formula is explained in [https://lua-api.factorio.com/latest/concepts/EnemyExpansionMapSettings.html EnemyExpansionMapSettings], <code>10/(10 + player structures in this chunk + player structures 1 chunk away / 2 + player structures 2 chunks away / 4 + 20 * enemy spawners in this chunk + 8 * enemy spawners 1 chunk away + 3.2 * enemy spawners 2 chunks away)</code>. Size and cost of structures does not matter, so pipes provide an exceptionally cheap method to lower expansion chances in certain areas.

	Every 4 to 60 minutes, the game selects a chunk at random as the target for an expansion attempt, weighted by the chunk scores. Then 5 to 20 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor.		Every 10 to 60 minutes, the game selects a chunk at random as the target for an expansion attempt, weighted by the chunk scores. Then 5 to 10 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor.

	When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a nest or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any unit can create any nest or worm that is native to the planet.		When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a nest or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any unit can create any nest or worm that is native to the planet.

Batbrain55: More polish, and added a cleanup template asking for info about the 2.1 changes.

2026-11-11T08:05:14Z

More polish, and added a cleanup template asking for info about the 2.1 changes.

← Older revision		Revision as of 08:05, 11 November 2026
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	{{Languages}}		{{Languages}}
	{{Stub}}		{{Stub}}
			{{Cleanup\|Update this article to reflect the changes made in 2.1.}}
	[[File:biter_intro.png\|175px\|right]]'''Enemies''' are creatures that may [[Damage\|attack]] the [[player]] and their buildings. They are the native inhabitants of the extraterrestrial worlds on which the player is operating. Enemies appear on the map in red.		[[File:biter_intro.png\|175px\|right]]'''Enemies''' are creatures that may [[Damage\|attack]] the [[player]] and their buildings. They are the native inhabitants of the extraterrestrial worlds on which the player is operating. Enemies appear on the map in red.

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	==Creatures==		==Creatures==
	===Biters===		===Biters===
	Biters are one of the earliest enemy types likely to be encountered. They come in four sizes: small, medium, big and behemoth. In the beginning of a game, there will only be small biters. [[Pollution]] will raise their [[#Evolution\|evolution]], which in turn will make them bigger. As common sense may suggest, their method of attack is a straightforward charge to "bite" things.		Biters are one of the earliest enemy types likely to be encountered on Nauvis. They come in four sizes: small, medium, big and behemoth. In the beginning of a game, there will only be small biters. [[Pollution]] will raise their [[#Evolution\|evolution]], which in turn will make them bigger. As common sense may suggest, their method of attack is a straightforward charge to "bite" things.

	{\| class="wikitable"		{\| class="wikitable"
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	===Spitters===		===Spitters===
	~~'''Spitters'''~~ are much like [[Enemies#Biters\|biters]] and only appear slightly later on in the game as the evolution factor increases. Their main difference from biters is their ranged attack. Using predictive aiming, they spit a stream of acid at enemies which leaves behind a puddle of acid where it hits the ground. Due to the spitters' predictive aiming, the acid stream can be dodged by suddenly changing walking directions or standing still.[https://factorio.com/blog/post/fff-279] Both the stream and the puddle of acid deal damage over time and slow down players and vehicles. Most entities of the game have a much lower resistance to acid than other damage types (including [[turret]]s and [[armor]]), so spitters are effectively more potent against the player and their factories. Their behavior and size classification are the same as with biters, but their health is universally lower and they are resistant exclusively against explosives, with no physical resistance.		Native to the planet Nauvis, spitters are much like [[Enemies#Biters\|biters]] and only appear slightly later on in the game as the evolution factor increases. Their main difference from biters is their ranged attack. Using predictive aiming, they spit a stream of acid at enemies which leaves behind a puddle of acid where it hits the ground. Due to the spitters' predictive aiming, the acid stream can be dodged by suddenly changing walking directions or standing still.[https://factorio.com/blog/post/fff-279] Both the stream and the puddle of acid deal damage over time and slow down players and vehicles. Most entities of the game have a much lower resistance to acid than other damage types (including [[turret]]s and [[armor]]), so spitters are effectively more potent against the player and their factories. Their behavior and size classification are the same as with biters, but their health is universally lower and they are resistant exclusively against explosives, with no physical resistance.

	{\| class="wikitable"		{\| class="wikitable"
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	===Worms===		===Worms===

	~~Worms~~ are natural allies of biters and spitters and will attack the player if they get close enough with ~~an attack~~ similar to spitters'. They act like static [[turret]]s and are incapable of moving. They rely on high damage, great range and splash damage to keep the player away from themselves and the spawners they protect, but either one of these advantages can be overcome. Unlike other enemies, they are also highly resistant to fire. They will spit acid at the player, which can also leave acidic puddles on the ground that can still damage players and vehicles, as well as slow them both down and leave a brief acidic, damaging effect for a few seconds. However, placed buildings and tiles are unaffected by the acid puddles, but still take damage normally by the acid projectile. Like spawners, they will be ~~automatically~~ targeted by [[artillery turret]]s and [[artillery wagon]]s.		Native to the planet Nauvis, worms are natural allies of biters and spitters and will attack the player if they get close enough with acid projectiles similar to that of spitters. They act like static [[turret]]s and are incapable of moving. They rely on high damage, great range and splash damage to keep the player away from themselves and the spawners they protect, but either one of these advantages can be overcome. Unlike other enemies, they are also highly resistant to fire. They will spit acid at the player, which can also leave acidic puddles on the ground that can still damage players and vehicles, as well as slow them both down and leave a brief acidic, damaging effect for a few seconds. However, placed buildings and tiles are unaffected by the acid puddles, but still take damage normally by the acid projectile. Like spawners, they will be targeted by [[artillery turret]]s and [[artillery wagon]]s set to automatic mode.

	Worms come in four sizes, their power increasing with size. Like biters and spitters, behemoth, big and medium worms spawning is influenced by the evolution factor. Worms are only created during enemy expansion when a certain evolution factor requirement is fulfilled. This is 0.3 for the medium worm, 0.5 for the big worm and 0.9 for the behemoth worm. Below these evolution factors, worms can only be created by the map generation. In map generation, the game restricts higher tier worms behind the distance from the starting point. The further away the player goes from the starting area, the stronger the worms become.		Worms come in four sizes, their power increasing with size. Like biters and spitters, behemoth, big and medium worms spawning is influenced by the evolution factor. Worms are only created during enemy expansion when a certain evolution factor requirement is fulfilled. This is 0.3 for the medium worm, 0.5 for the big worm and 0.9 for the behemoth worm. Below these evolution factors, worms can only be created by the map generation. In map generation, the game restricts higher tier worms behind the distance from the starting point. The further away the player goes from the starting area, the stronger the worms become.
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	=== Nests ===		=== Nests ===
	Nests in the wild will have their max health increase with evolution factor exponentially, up to 10 times their starting health.		Nests spawn enemies native to the planet. There are two types: spawners on Nauvis which can spawn either biters or spitters depending on the variant, and egg rafts on Gleba which spawn pentapods. Spawners can only exist on land, and egg rafts can only exist on shallow-water marsh.

			Nests in the wild will have their max health increase with evolution factor exponentially, up to 10 times their starting health. [[Artillery turret]]s and [[artillery wagon]]s in automatic mode will fire at all nests in range.

	Biter and spitter spawners can be captured by firing a [[capture bot rocket]] at one. After the spawner is captured, it must be given [[bioflux]] to maintain and continuously create [[biter egg]]s. If the spawner is not maintained, it will slowly lose 1 health per second, but when fed, it will gain 1 health per second.		Biter and spitter spawners can be captured by firing a [[capture bot rocket]] at one. After the spawner is captured, it must be given [[bioflux]] to maintain and continuously create [[biter egg]]s. If the spawner is not maintained, it will slowly lose 1 health per second, but when fed, it will gain 1 health per second.
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	Every 4 to 60 minutes, the game selects a chunk at random as the target for an expansion attempt, weighted by the chunk scores. Then 5 to 20 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor.		Every 4 to 60 minutes, the game selects a chunk at random as the target for an expansion attempt, weighted by the chunk scores. Then 5 to 20 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor.

	When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a ~~spawner~~ or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any unit can create any ~~spawner~~ or worm that is native to the planet.		When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a nest or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any unit can create any nest or worm that is native to the planet.

	* Biter spawners, spitter spawners and worms can only spawn on land tiles on Nauvis.		* Biter spawners, spitter spawners and worms can only spawn on land tiles on Nauvis.

Batbrain55: The game consistently calls biter nests "Spawners", even Captive Biter Spawners, so I've made some changes to better reflect this. Other tweaks.

2026-11-10T08:17:34Z

The game consistently calls biter nests "Spawners", even Captive Biter Spawners, so I've made some changes to better reflect this. Other tweaks.

Show changes

EnigmaBlock: /* Expansions */

2026-11-03T23:57:40Z

Expansions

← Older revision		Revision as of 23:57, 3 November 2026
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	Expansion score per chunk is 1.0 if there are no structures (player owned structures or spawners) within 3 chunks (taxi-cab distance). The score is penalized down to a minimum of 0.002 depending on the number of structures nearby. The exact formula is explained in [https://lua-api.factorio.com/latest/concepts/EnemyExpansionMapSettings.html EnemyExpansionMapSettings], <code>10/(10 + player structures in this chunk + player structures 1 chunk away / 2 + player structures 2 chunks away / 4 + 20 * enemy spawners in this chunk + 8 * enemy spawners 1 chunk away + 3.2 * enemy spawners 2 chunks away)</code>. Size and cost of structures does not matter, so pipes provide an exceptionally cheap method to lower expansion chances in certain areas.		Expansion score per chunk is 1.0 if there are no structures (player owned structures or spawners) within 3 chunks (taxi-cab distance). The score is penalized down to a minimum of 0.002 depending on the number of structures nearby. The exact formula is explained in [https://lua-api.factorio.com/latest/concepts/EnemyExpansionMapSettings.html EnemyExpansionMapSettings], <code>10/(10 + player structures in this chunk + player structures 1 chunk away / 2 + player structures 2 chunks away / 4 + 20 * enemy spawners in this chunk + 8 * enemy spawners 1 chunk away + 3.2 * enemy spawners 2 chunks away)</code>. Size and cost of structures does not matter, so pipes provide an exceptionally cheap method to lower expansion chances in certain areas.

	Every 60 ~~to 4~~ minutes, the game selects a chunk at random as the target for an expansion attempt, weighted by the chunk scores. Then 5 to 20 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor.		Every 4 to 60 minutes, the game selects a chunk at random as the target for an expansion attempt, weighted by the chunk scores. Then 5 to 20 enemy units from the closest spawners assemble into an expansion group and walk to the expansion target. The time between expansion attempts and the size of expansion groups is random, but weighted by evolution factor.

	When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a spawner or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any unit can create any spawner or worm that is native to the planet.		When the expansion group reaches its target, each unit will begin dying in sequence to randomly create a spawner or a worm after some delay. This destroys any entities in the way, including members of the expansion group. Any unit can create any spawner or worm that is native to the planet.