About This Game

What if it rained here? Watershed is a rain and flood simulation sandbox on real Earth terrain. Pick any place, a desert, a canyon, a mountain range, a forest or a city, and make it rain. Watch the water run downhill, gather into rivers, fill valleys into lakes and send flash floods racing down dry canyons.

Make it rain

Choose continuous rain, an hourly burst or a daily storm, and let it run for hours, days or weeks. The longer it rains, the bigger the floods. Turn the rainfall up and watch flash floods form.

See the land respond

Rivers find their way to the sea, lakes appear in basins, and over time vegetation greens along the rivers and lakes. When the rain stops, the water soaks in, dries and drains away.

Your sandbox

Pause anytime and check depth and flow at any point. Pick a simulation detail level, Fast, Balanced, Detailed or Extreme, to suit your graphics card.

Understand landscapes

Watching where rain goes shows why valleys, lakes and deserts look the way they do. It is a simplified illustration to explore and learn from, not an engineering model.

Also inside

Sea level and historical atlas layers, shareable scenario links, and two ready 40-minute lesson plans for classrooms. Made by Mozon, a one-person studio in Dubai. Requires an internet connection for map and terrain data.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Parts of the source code and some store and marketing text were written with help from AI coding assistants during development. All terrain, water simulation, satellite imagery and map data come from real geographic datasets. No AI-generated artwork, audio or narrative ships with the app, and nothing is generated during play.