Download size

How many GB is Zero-K?

6 GB

Leave at least 13 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

Zero-K (ZK; formerly known as Complete Annihilation and CA) is a free multi-platform open source real-time strategy computer game. Initially based on content from Total Annihilation on the open source Spring Engine, it was forked and all proprietary content replaced, and evolved into a completely new game with unique features. Among the games powered by the Spring game engine, Zero-K is particularly notable for its extensive use of Lua scripting for interface and gameplay changes/enhancements, as well as unique RTS concepts such as a flat technology tree.