Disease/infection
Characters can contract illnesses or infections that progress over time, imposing worsening penalties and requiring treatment, rest, or medicine. Disease adds a slow-burn survival threat distinct from immediate combat danger: an untreated infection is a ticking clock that forces the player to divert resources and attention, and in colony sims it turns a single wound into a management crisis. Designers use it to make the world persistently hostile beyond enemies, to give medicine and hygiene systems purpose, and to generate emergent stories (the outbreak that nearly wiped the colony). Key decisions: infection vectors (wounds, food, environment, other characters), progression pacing and reversibility, treatment depth (bed rest versus a full medical system), and contagion between characters (which turns one case into a management emergency). Pitfall: disease that's purely punitive — random debuffs the player can't prevent or meaningfully treat — feels like bad luck rather than a system, so counterplay and telegraphing are essential.
- Dev effort: Medium
- Timing: Real-time or turn-based
- Common in: survival, colony-sim
Seen in
- Project Zomboid
- RimWorld