Zero-K

Zero-K

Zero-K Team · April 27, 2018 · Strategy, Free to Play, RTS, Indie, Multiplayer

Zero-K is free to play — no purchase needed. We track it so you know if that ever changes.

PC
Very Positive94% · 4,37687playing now
This game is free to play. Get it on Steam →

Trailers & screenshots

Watch the Zero-K trailer →

Zero-K price

Zero-K is free to play — there is no purchase price, on Steam or anywhere else we track. We keep watching it, so if it ever stops being free the price history on this page will show when that happened and what it changed to.

About Zero-K

✦ AI summary

Command giant robots and manipulate terrain itself in this physics-driven RTS where you can dig canals, build mountains, and fling battleships across the map. With 100+ wildly creative units, a sprawling campaign, and truly free multiplayer from 1v1 to 16v16, Zero-K delivers complex strategy without a pay-to-win model or cheating AI.

Commander wanted! Construct giant robots, build an army of a thousand Fleas. Move mountains if needed. Bury the enemy at all cost!
  • Traditional real time strategy with physically simulated units and projectiles.
  • 100+ varied units with abilities including terrain manipulation, cloaking and jumpjets.
  • 70+ mission galaxy-spanning campaign to be enjoyed solo or co-op with friends.
  • Challenging, (non-cheating) skirmish AI and survival mode.
  • Multiplayer 1v1 - 16v16, FFA, coop. ladders, replays, spectators and tournaments.
  • Really free, no paid advantages, no unfair multiplayer.

Fully Utilized Physics

Simulated unit and projectile physics is used to a level rarely found in a strategy game.
  • Use small nimble units to dodge slow moving projectiles.
  • Hide behind hills that block weapon fire, line of sight and radar.
  • Toss units across the map with gravity guns.
  • Transport a battleship to a hilltop - for greater views and gun range.

Manipulate the Terrain

The terrain itself is an ever-changing part of the battlefield.
  • Wreck the battlefield with craters that bog down enemy tanks.
  • Dig canals to bring your navy inland for a submarine-in-a-desert strike.
  • Build ramps, bridges, entire fortress if you wish.
  • Burn your portrait into continental crust using the planetary energy chisel.

Singleplayer Campaign and Challenging AI

Enjoy many hours of single player and coop fun with our campaign, wide selection of non-cheating AIs and a survival mode against an alien horde.
  • Explore the galaxy and discover technologies in our singleplayer campaign.
  • Face a challenging AI that is neither brain-dead nor a clairvoyant cheater.
  • Have some coop fun with friends, surviving waves of chicken-monsters.
  • Cloaking? Resurrection? Tough choices customizing your commander.

Casual and Competitive Multiplayer

Zero-K was built for multiplayer from the start, this is where you can end up being hooked for a decade.
  • Enjoying epic scale combat? Join our 16v16 team battles!
  • Looking for a common goal? Fight AIs or waves of chicken-monsters.
  • Prefer dancing on a razor's edge? Play 1v1 in ladder and tournaments.
  • Comebacks, betrayals, emotions always running high in FFA.
  • Want to fight for a bigger cause? Join PlanetWars, a competitive online campaign with web-game strategic elements, diplomacy and backstabbing (currently on hiatus pending an overhaul).

Power to the People

We are RTS players at heart, we work for nobody. We gave ourselves the tools we always wanted to have in a game.
  • Do what you want. No limits to camera, queue or level of control.
  • Paint a shape, any shape, and units will move to assume your formation.
  • Construction priorities let your builders work more efficiently.
  • Don't want to be tied down managing every unit movement? Order units to smartly kite, strafe or zig zag bullets.

Plenty of Stuff to Explore (and Explode)

Zero-K is a long term project and it shows, millions hours of proper multiplayer testing and dozens of people contributing ever expanding content.
  • Learn to use all of our 100+ units and play on hundreds of maps.
  • Invent the next mad team-tactics to shock enemies and make allies laugh.
  • Combine cloaking, teleports, shields, jumpjets, EMP, napalm, gravity guns, black hole launchers, mind control and self-replication.
  • Tiny flea swarm that clings to walls?
  • Jumping "cans" with steam-spike?
  • Buoys that hide under water to ambush ships?
  • Mechs that spew fire and enjoy being tossed from air transports?
  • Carrier with cute helicopters?
  • Jumping Jugglenaut with dual wielding gravity guns?
  • Meet them in Zero-K!

Zero-K — game info

Platforms
Windows, Linux / SteamOS
Steam Deck
Unsupported
Player modes
Single-player, Online PvP, Online co-op, Cross-platform multiplayer
PC Game Pass
Not included
More games like this:Linux gamesCrossplay games

DLC & expansions

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

✦ AI summary

Zero-K is a free and actively supported RTS that offers unique mechanics like terraforming, flexible unit queuing, and a progression system without traditional tiers, earning praise from players who appreciate its depth and complex strategic options. However, some players criticize the game for poor performance in menus and gameplay, clunky UI design, and balance issues with early rushing, while others find it a solid if unconventional entry in the Total Annihilation lineage.

Recommended Sep 4, 2026
A very solid free(!) and still supported RTS that stands out by several aspects: - no Tiers in the usual sense. You can build top units at the start of the game. The trick is, your economy won't allow you to have enough. - terraforming. Dig holes, erect mountains or simple walls. - the best unit manipulation toolset I ever saw: we can add commands to queue from both sides (to the end of it using Shift and in front of the current order using Space), every unit tries to dodge projectiles automatically (no need to micromanage reactions for every shot), you can order an army to march keeping the formation and at the speed of the slowest unit, etc. - different branches of units to counter/dominate different strategies (e.g. spiders crawl on any angle of surface, jetpacks just jumping - a good counters for terraforming; tanks are slow but powerful and armored, rovers are fast and the best flankers etc.) So the main con is: - steep learning curve (campaign does not help much, but makes it somehow easier). Be ready to read wiki to trully understand the game
1 found this helpful
Recommended Aug 31, 2026
This game has the most important feature to come from the ancient halls of SpringRTS and it's lineage. Simple framework, and ever advancing units of scale. On a surface level, this is amass waves of units and send them to fight and die. Defense tech needs some early work, as you can probably not build enough defenses against a early rush unless you have unit to unit counters for it. Number tuning will take forever or at very least some interesting compromises once the math is ground out in testing. I can assure though despite the shell, this game is a good breach back into Total Annihilation style RTS.
1 found this helpful
Not recommended Sep 4, 2026
Extremely terrible "free" RTS. "Free" game doesn't mean it's a "good game". Plenty of bad ones. This is one of the bad ones. But WHYYY? The game runs slow as heck. From menus, to actual gameplay. It shouldn't be this way or this complicated. I still have Total Annihilation and recall play TA: Spring back in the day. You load it up. It worked. (of course, it's unstable, and CTDs now). I've also played Beyond All Reason, which is very close but is greatly lacking and clumsy. (Enemy commander kills himself and you win the game shortly after match starts. The tech/build menu is convoluted. The maps are waaay to fricken small, hence no strategy, and can bum-rush the AI and win in just a few minutes. Ugh.) I heard of Zero-K being an offshoot of the TA:Spring like B.A.R. is, so gave it whirl. Slow to load, the main menu is sloooow. Unresponsive at times. It's like its mining crypto or something behind the scenes or trying to scan entire drive. FFS, it's just a UI/menu screen. This should not have any issues whatsoever. The game translates into the actual gameplay. It's very much like B.A.R., clunky, slow, responsiveness issues, slow, dragging, turtling, SLOW. How complicated is this ga…
Recommended Sep 2, 2026
its pretty ok
Recommended Sep 2, 2026
An enjoyable and unique take on RTS, even within the Total Annihilation like games. I recommend RTS enjoyers give it a shot, if only for the unique perspective and mechanics.
Recommended Sep 1, 2026
A very deep, complex, fun RTS in the style of Supreme Commander. And it's fully free and still being actively update!

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