Project Summary
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.
In a Nutshell, Zero-K...
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has a well established, mature codebase
maintained by a large development team
with increasing Y-O-Y commits -
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took an estimated 472 years of effort (COCOMO model)
starting with its first commit in October, 2010
ending with its most recent commit about 22 hours ago
Quick Reference
CC Attribution-NonCommercial-ShareAlike 3.0
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These details are provided for information only. No information here is legal advice and should not be used as such.
GNU General Public License v2.0 or later
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Commercial Use
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Include Copyright
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryJul 30 2026 — Aug 29 2026
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12 Month SummaryAug 29 2025 — Aug 29 2026
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