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Micro Mayhem

Adds simplified microbiology to minecraft with mutation and selection for traits all with both custom and vanilla effects ranging from pathogens, to neutral, to beneficial.

File Details

micromayhem-1.21.1-2.5.5.jar

  • R
  • May 7, 2026
  • 474.95 KB
  • 73
  • 1.21.1
  • NeoForge

File Name

micromayhem-2.5.5.jar

Supported Versions

  • 1.21.1

Curse Maven Snippet

NeoForge

implementation "curse.maven:micromayhem-1534289:8055051"
Curse Maven does not yet support mods that have disabled 3rd party sharing

Learn more about Curse Maven

Fixed several bugs and issues: 

  • Swab stack-of-1 vanishing into thin air — single item now replaces hand directly instead of shrink+add
  • Creative death spam — added !isCreative() guard before applying illness death/damage
  • Debug syringe not infecting other players on servers — was using MobColony for everyone, now uses HostMicrobiome for players and MobColony for mobs
  • Adaptive immunity actually granted — onNaturalClearance was never being called when a strain cleared, so immunity never built up
  • Mob colony infection cap raised from 6 to 12
  • Contaminated suit now sheds onto nearby entities and blocks every 10 seconds
  • Hazmat suit 10 second grace period after autoclaving before re-contamination begins — stamps SterilizedAt timestamp, absorption tick skips for 10 seconds after sterilizationVaccine syringe recipe added — syringe + petri dish shapeless
  • Recipes not showing in JEI — recipe path was data/micromayhem/recipes/ but 1.21.1 changed it to data/micromayhem/recipe/ without the s. All 19 recipes copied to correct path.
  • Nutrient agar mushroom tag error — minecraft:mushrooms tag doesn't exist, replaced with explicit brown and red mushroom items, added separate recipe for each
  • Vaccine syringe recipe fixed — was requiring empty petri dish, changed to syringe + fermented spider eye. Strain loading happens at use time via offhand petri dish