You're the public-health team, flatten the curve by pushing the effective reproduction number under 1 before infections blow past the cap.
Each turn you allocate a limited budget across four levers, Testing, Distancing, Quarantine and Vaccine, while a live dial shows the effective R your plan would produce. Get R under 1.00 (the dial turns green) and commit the week to advance the disease model. Keep infections below the cap until the epidemic burns out.
Outbreak is an epidemiology strategy game built on a turn-based SIR disease model, teaching how infections spread and can be contained.
Allocating budget across testing, distancing, quarantine and vaccination while watching the effective R is a compartmental model — the S-I-R framework that divides a population into susceptible, infectious and recovered.
Making R the dial you steer is the original design.
R is the right number to show because of what happens at one. Above it an outbreak grows exponentially and below it dies out, so the target is not zero transmission but a threshold — and that is why interventions that sound modest can end an epidemic while interventions that sound drastic sometimes cannot.
Outbreak is an original epidemiology strategy game built around a turn-based SIR disease model. Play it free in your browser, no download needed.