The Great Collective for ECO is a free, open source repository designed to provide players with access to a variety of outdated or potentially unmaintained mods for the ECO game. This platform invites users to contribute by maintaining existing mods or suggesting new ones, provided they are open source. Notable mods available include NyElectrics, Seed Barrel, and Modern Solar Panels, among others. The repository is a collaborative effort, encouraging community engagement in modding and updating content for ECO.

Users can easily install mods by downloading them and unzipping them into the UserCode folder, which simplifies the process of enhancing gameplay. Additionally, translations for the mods are available on Crowdin, allowing users to contribute translations for their respective languages. The Great Collective fosters a community-driven environment where modding enthusiasts can share and improve their gaming experience.