Stop Bugs Cold in RimWorld 1.6 — Infestation Survival Tool (Fire Room / Melee Block / Base Freeze)

Stop Bugs Cold in RimWorld 1.6

Real Tactics That Don’t Wipe Your Colony
Fire Fire-Seal Bait Room
  • Thick stone walls + wood floor + incendiary IEDs
  • Throw a molotov, then Forbid the door
  • Heat kills insects fast (no shooting required)
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#SSSSSSSSS#   S = stone wall (thick)
#SIIIIIIIS#   I = incendiary IED
#SI.....IS#   . = wood floor
#SI..C..IS#   C = wooden chair (ignition)
#SI.....IS#   D = single wooden door
#SIIIIIIIS#
#SSSSSDSSS# → Set door to Forbid once lit
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Safety note: Use stone for walls/doors. Keep bedrooms and storages far away.
Melee Doorway Melee Block
  • 1-tile doorway + 3-wide corridor behind it
  • 3 armored melee blockers, shotguns behind
  • Best when you want loot intact (no fire)
Tip: rotate blockers if they get cut up—bugs hit hard and fast.
Rules Spawn Rules Cheat Sheet
Spawn Range—
Temp Limit—
Roof Type—
Frequency—
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Note: The game also scores tiles (mountainousness, closed areas, blockers). This checker covers the big “yes/no” gates and the temperature factor.
Dev Dev Mode Infestation Overlay
Dev Mode → View → Draw Infestation Chance (use it to confirm your bait room is the best tile group).
Blue = High Infestation Risk
Pick Fire vs. Melee vs. Freeze
Fire Room Melee Freeze
Quick Kill
Loot Safety
Power Needed
“Freeze” = keep overhead-mountain tiles below the hard stop temperature so infestations can’t start there.
Bio Wastepack Risk Math (Rule of Thumb)
If you play with Biotech, wastepacks can trigger insect problems. Use this as a quick gut-check.
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Tips: stone storage, remote blasts, and never let cocoons pop next to bedrooms.
After Clean Up Checklist
Odyssey Insect Lair “Queen Chamber”
Odyssey-style lairs play like dungeon rooms: bring both fire and melee, and expect chained fights.
If this panel doesn’t match your game, confirm your DLC/mod list. Everything above assumes vanilla RimWorld 1.6 behavior unless noted.
Code Verified Constants
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Mod note: If you run Better Infestations or similar, verify spawn tiles again with the Dev overlay—behavior can change.
Keyword target: how to beat infestation rimworld. This tool focuses on fast, low-risk play patterns (bait room / melee block / freeze) and the key spawn gates.