You're referring to Survarium, a popular online multiplayer game!
No other game quite captures the "Forest Reigns" aesthetic—the eerie beauty of nature reclaiming industrial ruins. Tight-Knit Community: Survarium Private Server
The project’s description explains its mission and scope: “ Survarium Fan Community is a fan community of the Survarium game universe. The server presents the Nature Rage project—a creative reimagining of the Survarium game universe, being realized on the Unity engine. It is being developed by a team of enthusiasts; we strive to preserve the spirit and atmosphere of the original game and bring our own creative ideas to it. The copyright holder, VG Entertainment (Vostok Games), is not involved with the project and does not sponsor it. Currently, the project is under development". You're referring to Survarium, a popular online multiplayer