Health
100 points. It comes back slowly while you're fed, breathing and out of danger, and much faster in bed.
Health only comes back when you're safe: breathing, out of any hazard, and with at least 25 Hunger. Lying in a Bed heals three times as fast, and doesn't care how hungry you are. Resting is what you do because you're in a bad way.
What hurts
| Source | Damage |
|---|---|
| Out of oxygen | 7 per second |
| Starving (0 hunger) | 1.1 per second |
| World heat or cold | 1.2 to 4.5 per second depending on the world, less with a suit |
| The deep | Up to 3.2 per second, the hotter it gets |
| Burning (fire spit) | 2.5 per second |
| Creatures | 4 to 14 a hit for hostile wildlife |
Blacking out
At zero health you black out and wake with full health, oxygen and hunger. You come round in your Bed if you've slept in one on a world in this system, otherwise back at home.