The Will loss is calculated as WillLossStat * WillLossStatMultiplier then max(, MinimumWillLoss). In fact, it seems Fatigue (Will loss) is entirely separate from the actions a soldier performs in a mission and seems solely determined by what they observe or have done to them. Seeing that these Will loss triggers are a percentage chance helps to explain the wildly varying amounts of Will loss among soldiers that went through the same mission taking similar actions. If a civilian, squadmate, or bondmade dies you have a 100% chance to lose Will. If that enemy is a Lost zombie then you have a 33% chance to lose Will.
Certain things trigger loss of Will and when you go below about 66% Will you become tired, below 33% you become Shaken.Įxamples: If you see an enemy you have a 50% chance to lose some Will.