Survival & Needs
Ordinary human limits: health, hydration, food, fatigue, cleanliness, exposure and coexisting conditions.

Health
Ordinary survivors have a natural maximum of 100 HP. HP represents physical health; it is not a hunger or thirst bar.
Hunger & hydration
Baseline abstract needs are roughly 2 L fluid/day and 2,000 kcal/day, modified by activity, weather and condition. The current branch uses staged pressure: Thirsty → Dehydrated and Hungry → Starving. Only severe states progress into HP deterioration, and only after continuous grace periods.
Severe-need recovery
Eating or drinking back above a severe threshold clears that condition's deterioration clock/remainder immediately. Damage is reconciled lazily, including after time away, and gameplay requests reconcile severe needs before allowing stale actions.
Cleanliness
Cleanliness is persistent from 0–100% with labels Clean, Presentable, Grimy, Dirty and Filthy. It decays lazily with time and activity. Safe House washing and suitable known natural water can restore it; Cleanliness is a condition rather than direct HP.
Coexisting status effects
Wet, Cold, Hungry, Dehydrated, Exhausted, Bleeding, Sick and other conditions can coexist. Their interaction matters more than one oversized MMO stat bar.
Sleep
Rest quality depends on real sleeping conditions: shelter, platform, bedding, bedding wetness, weather and survivor state. Camps and Safe House Bedrooms use exact physical sleeping gear.