Difference between revisions of "Spike trap"

Revision as of 12:11, 12 November 2023

A spike trap is a single-use trap that deals heavy, but material dependent damage to the pawn that triggered it.

Acquisition

Spike traps require 45 Stuff (Metallic/Woody/Stony), 3,200 ticks (53.33 secs) of work, and a Construction skill of 3. Spike traps cannot be placed or constructed directly next to each other nor next to any other kind of trap.

Summary

Spike traps are single use traps that may be triggered when a pawn of any kind walks over it.

The base trigger chance is 100% for enemies, including animals affected by the manhunter mental state. Note that despite the name, animals currently hunting a human pawn for food are not "manhunters" and are not considered enemies.
Non-manhunting wild animals have a 25% chance to trigger the trap.
Colonists and tame animals have 0.4% (one in 250) to trigger the trap.
Friendly visitors will never trigger a trap.

However, colonists and non-manhunting animals are aware of the location of traps, and will avoid pathing over them if reasonably possible. In all instances, the nimble trait multiplies the trigger chance for that pawn by 10%, that is, a 10% chance for enemies and 0.04% chance for friendly pawns.

Once a spike trap is triggered, it is destroyed. The "auto rearm" option, enabled by default, produces a blueprint to replace the trap.

Each spike trap is considered dirty with a Cleanliness of −5. This reduces the average cleanliness of the room it occupies.

Damage

When triggered, the spike trap makes five attacks against the pawn that triggered it. Each attack does Stab damage. This strikes mainly on the head and torso and usually causes bleeding. The amount of damage dealt by each attack is determined by the following equation:

Damage Per Attack = Trap Melee Damage * Material Sharp Damage Multiplier * rand(0.8, 1.2)/5

Where:

Damage per Attack is the damage each attack does to the target. A spike trap performs 5 of these attacks when triggered.
Trap Melee Damage is 100 for spike traps
Material Sharp Damage Multiplier is a material dependent factor.
rand(0.8,1.2) is a random factor between 0.8 and 1.2. This random factor is rolled once only and then applied to all attacks, it is not rolled for each attack.

The armor penetration of the attack is determined by the following equation:

AP = Damage Per Attack * 0.015

AP is the armor penetration of each attack.

Note that both the damage and AP of the attack in the info screen are misleading. The damage listed is the average sum of the damage inflicted, the AP is incorrectly calculated as if this damage is all dealt at once.

Analysis

For tips on how to use spike traps in general or in killboxes, see Defense structures#Spike traps and Defense structures#Entryways.

Spike traps are invaluable in the earlygame, as one of the few defense strutures available. A hallway of spike traps can virtually end any frontal raid, short of tough or nimble pawns, without your colonists ever seeing combat. A single trap can be fatal to humans or large animals. Multiple traps can fall most creatures, short of thrumbos and heavy mechanoids. But as raids get bigger, it starts to get impractical to replace the traps.

Place traps where you expect raiders to go. Raiders will take the shortest, unobstructed route to a target. Unless they are sappers or breachers, raiders will try and break walls last. Common locations are in the corners of your base, where enemies will likely make turns, as well as narrow areas that receive frequent traffic. If it doesn't seem obvious to you at first, one way to find out is by studying raids that do come.

Material choice

Wood spike traps can be quickly created and placed in large quantities. Stone spike traps are cheap to make, and can kill a humanoid raider in one trap. But given the significantly increased crafting time of both the traps themselves and the stone blocks required to build them, it is often more efficient to simply make several wooden traps. Stone traps are helpful if you're limited by space or type of resource available, and can be a good activity when one has the Work Frenzy Mental inspiration. Metal traps are even stronger and don't take as much time to make, but are expensive in terms of resources.

Example of a trap tunnel. Raiders will fall into the traps. Colonists can open doors, and prefer to be slowed by the fences rather than walk through traps. If this is the only open entrance to a base, raiders will be lured here.

Stats table

Spike trap	Beauty	Work to Build	HP	Flammability	Total Damage	Attack Damage	Armor Penetration	Market Value
Material	Beauty	Work to Build	HP	Flammability	Total Damage	Attack Damage	Armor Penetration	Market Value
Bioferrite	-18	008,000 ticks (2.22 mins)	80	75%	130	26	39%	63
Gold	2	002,880 ticks (48 secs)	24	40%	75	15	22.5%	4,510
Granite blocks	-18	019,340 ticks (5.37 mins)	68	0%	65	13	19.5%	110
Limestone blocks	-18	019,340 ticks (5.37 mins)	62	0%	60	12	18%	110
Marble blocks	-17	017,740 ticks (4.93 mins)	48	0%	60	12	18%	104
Plasteel	-18	007,040 ticks (1.96 mins)	112	0%	110	22	33%	430
Sandstone blocks	-18	016,140 ticks (4.48 mins)	56	0%	50	10	15%	99
Silver	-12	003,200 ticks (53.33 secs)	28	40%	85	17	25.5%	460
Slate blocks	-18	019,340 ticks (5.37 mins)	52	0%	60	12	18%	110
Steel	-18	003,200 ticks (53.33 secs)	40	40%	100	20	30%	97
Jade	-8	016,000 ticks (4.44 mins)	20	0%	100	20	30%	285
Uranium	-18	006,080 ticks (1.69 mins)	100	0%	110	22	33%	290
Wood	-18	002,240 ticks (37.33 secs)	26	100%	40	8	12%	62

Version history

0.11.877 - Added as Deadfall Trap.
0.12.910 - Rebalanced, cannot be rearmed.
0.19.2009 - Renamed from Deadfall trap to Spike trap. Damage is increased, material cost and time to build are reduced, and it now has armor penetration (depending on what it’s made of) and a 100% chance to spring on targets and but now require rebuilding each time, rather than being re-armed at no material cost.

Spike Trap Old Texture (Deadfall Trap)

Image gallery

Trap accidentally triggered.
Thrumbos running willy-nilly into a trap-maze.

Architect

Security: Barricade • Sandbags • Spike trap
(research): Autocannon turret • Foam turret • Mini-turret • Rocketswarm launcher • Uranium slug turret • Mortar
IEDs: IED trap • IED incendiary trap • IED EMP trap • IED firefoam trap • IED smoke trap • IED antigrain warhead trap • IED tox trap
Related: Antigrain warhead • EMP shell • Firefoam shell • High-explosive shell • Incendiary shell • Smoke shell • Tox shell

@@ Line 1: / Line 1: @@
-{{rewrite|reason=Format standardization and expansion}}{{infobox main|security|
+{{Infobox main|security
-|name = Spike trap
+| name = Spike trap
-|image = Trap spike armed.png
+| image = Trap spike armed.png
-|imagesize = 128px
+| imagesize = 128px
-|description = Five spikes under tension, connected to a touch-activated trigger. When the victim disturbs the trigger, the spikes spring forth and strike the victim. Since it is hidden in the surrounding terrain, it cannot be placed adjacent to other traps. Animals can sense these when calm.
+| description = Five spikes under tension, connected to a touch-activated trigger. When the victim disturbs the trigger, the spikes spring forth and strike the victim. Since it is hidden in the surrounding terrain, it cannot be placed adjacent to other traps. Animals can sense these when calm.
-|type = Building
+| type = Building
-|type2 = Security
+| type2 = Security
-|placeable = true
+| placeable = true
-|minifiable = true
+| minifiable = true
-|size = 1 ˣ 1
+| size = 1 ˣ 1
-|mass base = 2.5
+| mass base = 2.5
-|flammability = 1
+| flammability = 1
-|hp = 40
+| hp = 40
-|sell price multiplier = 0.7
+| sell price multiplier = 0.7
-|beauty = -18
+| beauty = -18
-|cleanliness = -5
+| cleanliness = -5
-|terrain affordance = light
+| terrain affordance = light
-|thingCategories = BuildingsSecurity
+| thingCategories = BuildingsSecurity
-|skill 1 = Construction
+| skill 1 = Construction
-|skill 1 level = 3
+| skill 1 level = 3
-|work to make = 3200
+| work to make = 3200
-|stuff tags = Metallic, Woody, Stony
+| stuff tags = Metallic, Woody, Stony
-|resource 1 = Stuff
+| resource 1 = Stuff
-|resource 1 amount = 45
+| resource 1 amount = 45
 }}
-{{for|tips on how to use spike traps in general or in killboxes|Defense structures#Spike traps|Defense structures#Entryways}}
+A '''spike trap''' is a single-use trap that deals heavy, but material dependent damage to the pawn that triggered it.
-A '''spike trap''' is a single-use trap that deals heavy damage when triggered. The damage can be fatal to humans or large animals if it is made of good materials. The base damage varies according to the material it was built from. The damage type is sharp melee, which strikes mainly on the head and torso and usually causes bleeding. The spike trap should be built out of stone or metal, as wood has a low damage output. Although stone spike traps take large amounts of time to make, they can kill a [[raider]] in one trap. See [[Defense structures#Spike traps|Defense structures (Spike Traps)]] and [[Defense structures#Entryways|Defense structures (Entryways)]] for more information.
-It creates a [[cleanliness]] penalty of -5.
+== Acquisition ==
+Spike traps require {{Required Resources}}, {{Ticks|{{P|Work To Make #}}}} of work, and a [[{{P|Skill 1}}]] skill of {{P|Skill 1 Level}}. Spike traps cannot be placed or constructed directly next to each other nor next to any other kind of [[trap]].
-===Placement===
+== Summary ==
-Deadfall traps cannot be placed directly next to each other or next to any other kind of [[trap]].
+Spike traps are single use traps that may be triggered when a pawn of any kind walks over it.
+* The base trigger chance is 100% for enemies, including animals affected by the [[Mental break#Manhunter|manhunter]] mental state. Note that despite the name, animals currently hunting a human pawn for food are not "manhunters" and are not considered enemies.
+* Non-manhunting wild animals have a 25% chance to trigger the trap.
+* Colonists and tame animals have 0.4% (one in 250) to trigger the trap.
+* Friendly visitors will never trigger a trap.
-===Triggering and rearming===
+However, colonists and non-manhunting animals are aware of the location of traps, and will avoid pathing over them if reasonably possible. In all instances, the [[nimble]] trait multiplies the trigger chance for that pawn by 10%, that is, a 10% chance for enemies and 0.04% chance for friendly pawns.
-The base trigger chance is 100% for enemies. Colonists, friends, tame animals, and wild animals not affected by manhunter are aware of the location of traps and will avoid them if possible. If they do walk through one, they have a 0.4% (one in 250) chance of triggering it.
-In both instances, the [[Traits#Nimble|nimble trait]] reduces the trigger chance for that pawn to 10%, namely 10% chance for enemies or 0.04% for colonists and friendlies.
+Once a spike trap is triggered, it is destroyed. The "auto rearm" option, enabled by default, produces a blueprint to replace the trap.
+{{Cleanliness Note}}
+=== Damage ===
+When triggered, the spike trap makes five attacks against the pawn that triggered it. Each attack does [[Damage Type#Stab|Stab]] damage. This strikes mainly on the head and torso and usually causes bleeding. The amount of damage dealt by each attack is determined by the following equation:
+{| class="wikitable"
+| Damage Per Attack = Trap Melee Damage * Material Sharp Damage Multiplier * rand(0.8, 1.2)/5
+|}
+Where:
+* Damage per Attack is the damage each attack does to the target. A spike trap performs 5 of these attacks when triggered.
+* Trap Melee Damage is 100 for spike traps
+* Material Sharp Damage Multiplier is a material dependent factor.
+* rand(0.8,1.2) is a random factor between 0.8 and 1.2. This random factor is rolled once only and then applied to all attacks, it is not rolled for each attack.
+The armor penetration of the attack is determined by the following equation:
+{| class="wikitable"
+| AP = Damage Per Attack * 0.015
+|}
+* AP is the armor penetration of each attack.
-Manhunter animals lose their ability to sense and avoid traps, as well as [[Thrumbo]]s, that don't seem to see them and go into trap-mazes.
+Note that both the damage and AP of the attack in the info screen are misleading. The damage listed is the average sum of the damage inflicted, the AP is incorrectly calculated as if this damage is all dealt at once.
-When a colonist, prisoner, or tame animal triggers a trap, a yellow envelope alert appears to notify the player.
+== Analysis ==
+{{For|tips on how to use spike traps in general or in killboxes|Defense structures#Spike traps|Defense structures#Entryways}}
+Spike traps are invaluable in the earlygame, as one of the few defense strutures available. A hallway of spike traps can virtually end any frontal [[raid]], short of [[tough]] or [[nimble]] pawns, without your colonists ever seeing combat. A single trap can be fatal to humans or large animals. Multiple traps can fall most creatures, short of [[thrumbo]]s and heavy [[mechanoid]]s. But as raids get bigger, it starts to get impractical to replace the traps.
-Once a spike trap is triggered, it is destroyed. The "auto rearm" option, enabled by default, produces a blueprint to replace the trap.
+Place traps where you expect raiders to go. Raiders will take the shortest, unobstructed route to a target. Unless they are sappers or breachers, raiders will try and break walls last. Common locations are in the corners of your base, where enemies will likely make turns, as well as narrow areas that receive frequent traffic. If it doesn't seem obvious to you at first, one way to find out is by studying raids that do come.
-They take {{Required Resources}} and {{Ticks|{{P|Work To Make}}}} to build (time to build varies depending on building material, see chart below).
+=== Material choice ===
+Wood spike traps can be quickly created and placed in large quantities. Stone spike traps are cheap to make, and can kill a humanoid [[raider]] in one trap. But given the significantly increased crafting time of both the traps themselves and the stone blocks required to build them, it is often more efficient to simply make several wooden traps. Stone traps are helpful if you're limited by space or type of resource available, and can be a good activity when one has the Work Frenzy [[Mental inspiration]]. Metal traps are even stronger and don't take as much time to make, but are expensive in terms of resources.
-==Stats==
+[[File:Trap_choke_14.jpg|400px|center|thumb|Example of a trap tunnel. Raiders will fall into the traps. Colonists can open [[door]]s, and prefer to be slowed by the [[fence]]s rather than walk through traps. If this is the only open entrance to a base, raiders will be lured here.]]
-*Note: Actual armor penetration is much lower since damage is applied multiple times rather than in one single instance.
-[[Rest Effectiveness Base::1| ]] [[Flammability Base::1| ]] [[Comfort Base::0.75| ]] [[Immunity Gain Speed Factor::1.07| ]] [[Work To Make Base::800| ]]
-<div><li style="display: inline-table;">
-{| {{STDT|sortable c_01 align-center}}
+{{Building Stats Table}}
-![[Material]]
-!Cost
-!Damage
-!Armor Penetration
-!Flammability
-!Work to build
-![[Beauty]]
-|-
-![[Silver]]
-||{{icon small|silver}} 450          ||85 ||128% ||40% ||54 ||-12
-|-
-![[Gold]]
-||{{icon small|gold}} 450            ||75 ||112% ||40% ||75 ||2
-|-
-![[Steel]]
-||{{icon small|Steel}} 45            ||100 ||150% ||40% ||54 ||-18
-|-
-![[Plasteel]]
-||{{icon small|plasteel}} 45         ||110 ||165% ||0% ||118 ||-18
-|-
-![[Wood]]
-||{{icon small|wood}} 45             ||40 ||60% ||100% ||38 ||-18
-|-
-![[Uranium]]
-||{{icon small|uranium}} 45          ||110 ||165% ||0% ||102 ||-18
-|-
-![[Jade]]
-||{{icon small|jade}} 45             ||100 ||150% ||0% ||267 ||-8
-|-
-![[Sandstone Blocks|Sandstone]]
-||{{icon small|sandstone blocks}} 45 ||50 ||75% ||0% ||269 ||-18
-|-
-![[Granite Blocks|Granite]]
-||{{icon small|granite blocks}} 45   ||65 ||98% ||0% ||323 ||-18
-|-
-![[Limestone Blocks|Limestone]]
-||{{icon small|limestone blocks}} 45 ||60 ||90% ||0% ||323 ||-18
-|-
-![[Slate Blocks|Slate]]
-||{{icon small|slate blocks}} 45     ||60 ||90% ||0% ||323 ||-18
-|-
-![[Marble Blocks|Marble]]
-||{{icon small|marble blocks}} 45    ||60 ||90% ||0% ||296 ||-17
-|}
-</li><div>
-==Version history==
+== Version history ==
 * [[Version/0.11.877|0.11.877]] - Added as '''Deadfall Trap'''.
 * [[Version/0.12.910|0.12.910]] - Rebalanced, cannot be rearmed.
+* [[Version/0.19.2009|0.19.2009]] - Renamed from '''Deadfall trap''' to '''Spike trap'''. Damage is increased, material cost and time to build are reduced, and it now has armor penetration (depending on what it’s made of) and a 100% chance to spring on targets and but now require rebuilding each time, rather than being re-armed at no material cost.
 <gallery>
 DeadfallTrap.png|Spike Trap Old Texture (Deadfall Trap)
 </gallery>
-==Image gallery==
+== Image gallery ==
 <gallery mode="packed" heights="200px">
 Spike trap accidental step.jpg|Trap accidentally triggered.
@@ Line 110: / Line 89: @@
 </gallery>
-{{nav|security}}
+{{Nav|security}}
+[[Category:Security]] [[Category:Trap]]
-[[Category:Security]]