Warzone 2100 is a free and open source 3D real-time strategy game with a story-driven single-player campaign, online multiplayer for up to ten players, and local skirmish modes against AI opponents.
The game addresses the desire for a fully open source RTS title by combining a remastered campaign featuring expanding persistent bases and away missions with extensive multiplayer capabilities. Players progress through a tech tree containing over four hundred technologies and customize units using a flexible design system to enable varied tactical approaches. The engine supports multiple graphics backends including OpenGL, OpenGL ES, and Vulkan, and multiplayer works across platforms.
The project suits players seeking a traditional RTS experience without proprietary restrictions, whether for single-player story content, competitive online battles, or offline skirmish play. It runs on Windows, macOS, Linux, and BSD. The game originated as a commercial title released in 1999 and was open sourced in 2004 after all proprietary technologies were replaced with open source alternatives.
Development activity shows consistent community engagement with regular workflow-based builds available for Windows and macOS through the repository's actions system. Bug reports and contributions are explicitly welcomed, indicating an open posture toward external participation. The project maintains active development on the main branch with successful builds tracked through automated testing infrastructure.
