Zero-K

About

Zero-K is a free open-source real-time strategy game built on the Spring Engine. Players manage resources, construct bases, and command armies in matches that blend tactical planning with fast-paced combat. Unlike traditional tech trees that branch into specialized paths, Zero-K uses a flat progression system where upgrades scale linearly. The game supports single-player scenarios, multiplayer battles, and co-op play, all with deep customization options. It runs on Windows, Mac, and Linux, and its development community actively updates the game with new content. The game’s open architecture lets players tweak mechanics and design units using Lua scripting, making it a favorite among modders. Its roots in Total Annihilation give it a legacy feel while modernizing core systems like unit behavior and map design. With over a decade of active development and a thriving competitive scene, Zero-K offers a polished yet flexible RTS experience. The lack of paywalls and the team’s focus on accessibility have kept it relevant in a genre often dominated by newer titles.