Zero-K is a Free RTS Game

Free and Open Source (FOSS)

Completely Free to Play (F2P) - not a single gameplay element can be unlocked through payment. [more info]
Source code open to public, that means you can look up any game mechanic and resource in the freely available game files.
Windows, Linux and partial OS X support - head to the download page and grab what you want!

Realtime Strategy (RTS)

Powerful Interface

Natural Balance allows units to depend on their natural characteristics and the benefits of the physically simulated environment.

Multiplayer and Singleplayer gameplay. You can play 1v1, 2v2, even 10v10 and larger games. Free-for-all, PvE or custom missions.

Epic Scale: From tiny flea-bots to huge mechs and gigantic superweapons wreaking havoc - hundreds or thousands of units on the battlefield, easily viewable with a fully pannable and zoomable camera.

Streamlined Economy: complex without being tedious, with a simple interface and controls. Resource output can be scaled up as the game progresses, creating increasingly intense battles. The system is designed to allow skilled players to make comebacks from losing positions.

Tons of Features

(psst, watch the Gameplay Features Trailer)

Terraform the landscape: raise walls, dig ditches, build ramps and more to provide yourself with an extra tactical advantage.
Realistic Physics mean each shot is physically simulated realtime - you can actually evade bullets if you micro-manage your units! Hills and terrain affect line of sight and radar coverage, and explosions deform the terrain.
Unique Abilities make sure units are fun to use. From jump-jets, gravity turrets, mobile shields, burning napalm, air drops, Commander morphs, EMP, minelayers, burrowers, replicators, and teleporters - we've got it all and more!
Planet Wars lets you take control of your own planet and fight for survival in an ongoing online campaign.

*Some of the many units to try out include:*

There is much more to discover, but listing all of it is not as fun as finding and trying them out yourself so visit the Downloads page!

Zero-K is made by the players, for the players. All game developers are active and experienced players. Balance and fun are assured.

Zero-K is a free real time strategy (RTS), that aims to be the best open source multi-platform strategy game available :-)