Keep a river in balance turn by turn, knowing that every intervention you make schedules a delayed downstream cost you'll have to weather later.
Was this fun?
How to play
Each turn you choose one action for the river. The immediate effect helps, but it queues a lagged side-effect, silting, churn, or a population crash, so you have to plan for the long haul, not the next turn.
Observe to do nothing, or intervene: build a dam, clean up pollution, or restock fish.
Each intervention gives a benefit now and a delayed cost later, shown in the pending-effects pipe.
Read the water, pollution, fish, and plant bars to judge the ecosystem's health.
Survive the full run with the highest resilience score; intervening recklessly tanks it.
Controls
Desktop: click the action buttons and the Daily/Practice and New Run buttons.
Phone & tablet: tap the actions, fully touch-enabled.
Game modes
Daily (shared seed) and Practice (random).
Tips & strategy
Watch the pending-effects pipe; don't stack interventions whose lagged costs all land on the same turn.
Sometimes Observe is the strongest move, letting the system settle beats triggering another delayed shock.
What you'll learn
Downstream is a systems-thinking simulation about ecology, feedback loops and the delayed consequences of decisions.
Skills: systems thinking, ecology, feedback loops, sustainability
Best for: roughly grades 6–12 (ages 11+)
For parents & teachers: ecological systems and feedback.
About Downstream
Downstream is a systems-thinking simulation about ecology, feedback loops, and the delayed consequences of well-meaning fixes. It is an original, free browser game built in-house.
A free, original browser game on PlayPendium. No download, no install.
