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The Mental Toll: Panic & Stress


Panic and Stress are core survival mechanics in Project Zomboid. High panic reduces player combat effectiveness (accuracy and damage), while chronic stress leads to unhappiness and depression. You can fine-tune these rates in your sandbox settings to create a “Hardened Survivors” or “Terrified Rookies” experience.
Reading TimeDifficultyLast Updated
5 minutesIntermediateJanuary 2026

Configuration Variables

These settings are found in your {ServerName}_SandboxVars.lua file.

1. Combat Panic

  • PanicIncreaseValue: Determines how much a player’s heart rate spikes when spotting a zombie.
  • PanicDecayRate: Dictates how quickly a survivor “calms down” after leaving a horde’s vicinity.
    • Optimization: For more experienced/veteran survivor servers, increase this decay rate.

2. General Mental Health

  • UnhappinessIncrease: The speed at which players develop depression.
  • BoredomDecrease: How effective activities like reading or exercising are at removing the “Bored” moodle.

The Smoker Trait

Stress is most commonly caused by the “Smoker” trait if a player hasn’t consumed a cigarette recently. Since there is no global server variable to disable smoker-specific stress, we recommend providing Cigarettes and a Lighter in your server’s “Starter Kit” to prevent initial player frustration.

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Last Updated: January 2026 | Project Zomboid: Mental health settings set.