RimWorld

RimWorld

TC Apr 26, 2020 @ 5:09pm
A sapper response.
How to prevent sappers?

I got a raid message with sappers.
It's not a very big raid. But also not small.

I activated my ICE zone. So nobody uses the outer walls and stays in base.
I rally up my fighters (+10 shooting) and my workers (-10 shooting) . They are armed to the teeth. But because of the ice biome they only have flak vest.

A doctor, brawlers and pacifists go into the hospital (shelter zone).

I see the raiders rushing to the side of my base. I send my first platoon they open the door, stand before it. And start shooting. The second platoon standing behind the door.

And then I saw it.
A sound I feared.
A doomsday shot.

Somehow my fighter platoon is still standing, but the platoon behind the door got blasted big time. Half of them are downed, one dead, and the rest is running around on fire.

A mark the shelter zone for everybody so everyone is retreating to the hospital. The fights have orders to rescue the downed Pawns. I see Pawns picking up downed Pawns on fire, getting themself on fire.

The left side of the base is in fire. Preventing the raiders to invade.

After a few moments everyone is in the hospital. The doctor is rushing to patch everyone up. I hear blasts north of the base. There is a breach. Raiders are swarming in and grenades are being grown. It's mostly furniture and walls that get blasted.

I count the healthy Pawns and rally them up to try to fight back. But on'y one step outside and a pawn got hit and is downed. Rescuing the pawn costs another pawn again. So a retreat is necessary.

One pawn could not cross over the hallway safely so he hides in the freezer.

More blasts in the base. We have to wait it out and make a regroup.

Then a message came in. Fiends arrived!

They are landing at the landing zone and rushing to the raiders. A few moments later they flee into my killbox. I deactivated the shelter zone and switched to the home zone. So Pawns spread out picking up downed raiders.

When the last raider died I counted the prisoners.

Damage reports:
Furniture
Wooden doors
Uranium outer walls
Slate inner walls
1 dead pawn

4 POW

After two days everything got fixed up. The dead raiders got piled up and a fire got rid of them.

Iwon the battle. But my preparation for sappers was terrible.

It was a nice drame. And it was fun!
Originally posted by gussmed:
Doors don’t matter to sappers. Neither do walls.

Sappers choose a destination in your base, and attempt to draw a path to it that involves the least turret coverage. They ignore doors and walls when planning, since they intend to blow through them once they reach them.

If you only cover doors with turrets, they’ll blow a hole in a wall so they can avoid the turrets.

Really, your trap corridor shouldn’t have a door. Non-sapper raids try to find a path where they can just walk in, and you want that to be your defended zone. If they can’t find one, they’ll break down walls. Put a door in front of your defense zone, and non-sapper raids will break down ANY exterior wall to get in, likely bypassing your main defenses.

It’s true that owned beds are the primary targets of sappers, but they’ll go for other things if you don’t have any.
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Showing 1-12 of 12 comments
grapplehoeker Apr 26, 2020 @ 5:45pm 
Originally posted by TC:
How to prevent sappers?
I don't prevent them...
I allow them into my base and once they're in, they're dead ;)
My base design is a ring of rooms and 4 entry points lined with traps. The interior is a huge killbox and so I don't try to prevent entry, in fact I encourage all raids to come inside ;)
Even if sappers refuse the temptation to enter via the open corridors and bomb their way in via a wall, they will still enter the interior of the base, which is just where I want them.
https://steamcommunity.com/sharedfiles/filedetails/?id=2070484867
Tohtori Leka Apr 26, 2020 @ 5:45pm 
Sappers will try to dig a way through walls that are not guarded by turrets. Use that to your advantage and steer the sappers where you want them.
TC Apr 26, 2020 @ 5:51pm 
Originally posted by grapplehoeker:
Originally posted by TC:
How to prevent sappers?
I don't prevent them...
I allow them into my base and once they're in, they're dead ;)
My base design is a ring of rooms and 4 entry points lined with traps. The interior is a huge killbox and so I don't try to prevent entry, in fact I encourage all raids to come inside ;)
Even if sappers refuse the temptation to enter via the open corridors and bomb their way in via a wall, they will still enter the interior of the base, which is just where I want them.
https://steamcommunity.com/sharedfiles/filedetails/?id=2070484867

That's a big base!
Do you have a high quality screenshot?
I would love to see more in detail.

What is your wealth of this map?



---
I can make a second layer and put defense in it. Some kind of no man's land. It's a ice biome so these is nothing on the map anyway :p
grapplehoeker Apr 26, 2020 @ 6:21pm 
Originally posted by TC:
That's a big base!
Do you have a high quality screenshot?
I would love to see more in detail.

What is your wealth of this map?
It is big because I use the turret range around the Spider to determine the size of the interior so that all 4 entryways and the whole of the interior has maximum cover fire.
Currently, wealth is at 413k
https://steamcommunity.com/sharedfiles/filedetails/?id=2075547495
I expect it to go much higher as I've just gained cataphract tech and Erisen has just been promoted to noble. Eventually, I'll have at least 5 nobles and that means 5 throne rooms fit for a king plus bedrooms to match. Yes, I know you may share thronerooms now, but I don't care lol and they will all be extremely impressive.
I'm still debating on ending with Final Ascent or building my own spaceship, and that will send the wealth sky high too ;)
If you want to see more, view the shots on my profile (filter for Rimworld). If there's any part you want to see in more detail, feel free to ask.
Last edited by grapplehoeker; Apr 26, 2020 @ 6:23pm
Raymond Apr 26, 2020 @ 6:34pm 
if you have dlc, your psycaster can make short work of any sapper raid. If you don't, put turret anywhere you dont want sapper to go through. Molotov and grenade work wonder.
gussmed Apr 26, 2020 @ 7:24pm 
What Tohtori and YariMurai said.

Basically, completely surround your base with turrets. Small ones, to start, and just enough to completely cover all approaches.

Leave one way in that isn't covered by turrets. That's where the sappers will go. If that one way in has lots of spike traps, the sappers are going to get killed by those. Sappers don't detect traps, just turrets.

Eventually you want more extensive turret coverage, with more turrets and heavier ones. Not for the sappers. For raids that come in by drop capsule and bypass your walls that way.
TC Apr 27, 2020 @ 4:29am 
Will sappers prefer doors? Or has that no value?

Every x tiles there is a door.
So I can place turrets there. And one door with no turrets. But spike traps
Last edited by TC; Apr 27, 2020 @ 6:33am
8faiNt ı♣ı Apr 27, 2020 @ 6:26am 
Originally posted by TC:
Will sappers prefer doors? Or has that no value?

Every x tiles there is a door.
So I can place turrets there. And one door with no turrets. But spike traps
sappers will go for bedrooms
Last edited by 8faiNt ı♣ı; Apr 27, 2020 @ 6:26am
TC Apr 27, 2020 @ 6:34am 
Originally posted by 8faiNt ı♣ı:
Originally posted by TC:
Will sappers prefer doors? Or has that no value?

Every x tiles there is a door.
So I can place turrets there. And one door with no turrets. But spike traps
sappers will go for bedrooms


Thank you!
I was wondering why the most damage was done in the bedroom.

Was this just a coding thing? Or has it some more behind it?



Funny note:
During large scale events like this there are not enough Pawns for cleaning the hospital. When every bed is occupied and some even need to lay on the floor to get fixed up infections are rapidly spreading!

Infections take lots of maintenance and meds.

Do you see it before you?
Pawns crying and bleeding. Begging for help when the doctor is fixing up everyone. Someone reports an infection. You need to make a decision. Long term healing while everyone is under attack? Do you take the risk maybe the doctor gets downed and infections kill the pawns?

The doctor chapped off 4 limbs and removed/replaced organs.

Not to mention all the burned up and shot/ blasted limbs.

I'm still making bionics to fix everyone :p
The author of this thread has indicated that this post answers the original topic.
gussmed Apr 27, 2020 @ 6:46am 
Doors don’t matter to sappers. Neither do walls.

Sappers choose a destination in your base, and attempt to draw a path to it that involves the least turret coverage. They ignore doors and walls when planning, since they intend to blow through them once they reach them.

If you only cover doors with turrets, they’ll blow a hole in a wall so they can avoid the turrets.

Really, your trap corridor shouldn’t have a door. Non-sapper raids try to find a path where they can just walk in, and you want that to be your defended zone. If they can’t find one, they’ll break down walls. Put a door in front of your defense zone, and non-sapper raids will break down ANY exterior wall to get in, likely bypassing your main defenses.

It’s true that owned beds are the primary targets of sappers, but they’ll go for other things if you don’t have any.
gussmed Apr 27, 2020 @ 6:55am 
Originally posted by TC:
During large scale events like this there are not enough Pawns for cleaning the hospital. When every bed is occupied and some even need to lay on the floor to get fixed up infections are rapidly spreading!

You can treat colonists in any bed, not just beds marked as for medical use. Any bedroom can double as a sick room. A dedicated hospital with sterile tiles is usually better, but if it’s full, you don’t have to treat them there.

Infection chance depends on the bed and the cleanliness of the room. Lying on the ground is much worse for infection chance than a bed.
TC Apr 27, 2020 @ 7:12am 
Originally posted by gussmed:
Originally posted by TC:
During large scale events like this there are not enough Pawns for cleaning the hospital. When every bed is occupied and some even need to lay on the floor to get fixed up infections are rapidly spreading!

You can treat colonists in any bed, not just beds marked as for medical use. Any bedroom can double as a sick room. A dedicated hospital with sterile tiles is usually better, but if it’s full, you don’t have to treat them there.

Infection chance depends on the bed and the cleanliness of the room. Lying on the ground is much worse for infection chance than a bed.


I agree.
During this particulary attack there everybody was hiding in the bunker. That also is the hospital. so no other beds where availible.
I got 50% hospital beds coverage. With beds on the ground I can up it to 10 more to 90% coverage.

We couldnot go to other beds as the material to make them, and the baracks where blasted during the crisis :p

I will have to expand the hospital. maybe moving the research room and expending from there.


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Date Posted: Apr 26, 2020 @ 5:09pm
Posts: 12