EcoSystem Observer

EcoSystem Observer is a browser-based autonomous ecosystem simulation.

Choose the initial populations and limits for spiders, bugs, ants, and frogs. Before starting, make three predictions:

• Which species will survive last?

• When will the ecosystem become extinct?

• How much biological production will it generate?

Once the simulation begins, the ecosystem develops independently. Species move, reproduce, hunt, consume resources, age, die, and affect the balance of the entire system. Your role is to observe what happens and compare the final results with your predictions.

The ecosystem itself is the game.

Features

• Autonomous simulation with four interacting species

• Configurable starting populations and population limits

• Three prediction categories

• Detailed final statistics

• CSV history export

• Dark and Light themes

• Full keyboard navigation

• Eight interface languages

Controls

• Tab and Shift+Tab — move between controls

• Left and Right Arrow — adjust sliders

• Enter or Space — activate the focused control

• Mouse controls are also supported

Browser requirements

EcoSystem Observer runs in a modern desktop browser. Google Chrome and Safari have been tested. JavaScript must be enabled.

Controls

Use the Simulation menu to configure populations and predictions.

The interface supports mouse and keyboard navigation.

Supported languages

English, Russian, Spanish, Brazilian Portuguese, German, French, Japanese, and Simplified Chinese.

Links

Official website:

https://ecosystem-observer.mooo.com

Source code:

https://github.com/alex-x-st/ecosystem-observer

Support the project:

https://ko-fi.com/ecosystemobserver

Licensing

Source code — GNU GPL v3.0:

https://github.com/alex-x-st/ecosystem-observer/blob/main/LICENSE

Artwork and branding — © 2026 Aleksei Shcherbakov All rights reserved:

https://github.com/alex-x-st/ecosystem-observer/blob/main/ASSETS_LICENSE.md

Credits

Author and Product Owner: Aleksei Shcherbakov

AI-assisted development: ChatGPT