They Are Billions is a strategy game in a distant future about building and managing human colonies after a zombie apocalypse destroyed almost all of human kind. Now there are only a few thousand humans left alive that must struggle to survive under the threat of the infection. Billions of infected roam around the world in massive swarms seeking the last living human colonies.

Game Modes


In the campaign mode, you have to help the surviving humans to reconquer their country. There are dozens of missions with different goals: building colonies, tactical missions, rescue missions... You can decide the path of progress and mission - research new technologies, advances and upgrades to improve your colonies and army.

Survival Mode

In this mode, a random world is generated with its own events, weather, geography, and infected population. You must build a successful colony that must survive for 100 days against the swarms of infected. It is a fast and ultra addictive game mode. We plan to release a challenge of the week where all players must play the same random map. The best scores will be published in a leaderboard.

Real Time with Pause

This is a real-time strategy game, but don’t get too nervous. You can pause the action to take the best strategic and tactical decisions.

In Pause Mode, you can place structures to build, give orders to your army, or consult all of the game’s information.

This game is all about strategy, not player performance or the player’s skill to memorize and quickly execute dozens of key commands. Pause the game and take all the time you need!

Build your Colony

Build dwellings and acquire food for the colonists. They will come to live and work for the colony.

Collect resources from the environment using various building structures. Upgrade buildings to make them more efficient.

Expand the energy distribution of the colony by placing Tesla Towers and build mills and power plants to feed the energy to your buildings.

Build walls, gates, towers, and structures to watch the surroundings. Don’t let the infected take over the colony!

Build an Army

What kind of people would want to combat the infected?

Only the maddest ones. Train and contract mercenaries to protect the colony. They demand their money and food, and you will have to listen to their awful comments, but these tormented heroes will be your best weapon to destroy the infected.

Every unit is unique and has their own skills and personality – discover them!

Thousands of Units on Screen

Yes! They are billions! The world is full of infected creatures… they roam, smell, and listen. Every one of them has their own AI. Make noise and they will come – kill some of them to access an oil deposit and hundred of them will come to investigate.

We have created our custom engine to handle hordes of thousands of the infected, up to 20,000 units in real time.

Do you think your colony is safe? Wait for the swarms of thousands of infected that are roaming the world. Sometimes your colony is in their path!

Prevent the Infection

If just one of the infected breaks into a building, all the colonies and workers inside will become infected. The infected workers will then run rabid to infect more buildings. Infections must be eradicated from the beginning, otherwise, it will grow exponentially becoming impossible to contain.

Beautiful 4K Graphics!

Prepare to enjoy these ultra high definition graphics. Our artists have created tons of art pieces: Beautiful buildings with their own animations, thousands of frames of animation to get the smoothest movements and everything with a crazy Steampunk and Victorian style!

Set to Release Winter 2018.

  • View media
  • View media
  • View media
  • View media
  • View media
  • View media
Post article RSS Articles


After two weeks of testing the level editor and the workshop, we are glad to announce that it’s finally ready. Thank you very much to all the players that joined the editor testing group and shared their feedback with the developers. Right now there are more than 80 levels to enjoy, and we’re sure there are many more to come soon. The editor and custom levels access is now available with the new version of They Are Billions: V.0.10

Playing Custom Levels

It’s very easy and straightforward. Just start the game and press New Game. There are now more options to play: Survival, Community Challenge and Custom Levels. Select the Custom Levels option to access the Levels Dashboard. You will find there the list of all the levels you are subscribed to. Just select the one you wish to play (in some of them you can configure the map type) and good luck! :)

How to Get New Levels

In the custom levels dashboard there is a link to the They Are Billions workshop. Select the levels you like and press the Subscribe button. You can do it directly from the workshop steam page here: Press the update button in the dashboard for a refreshed list of levels including the new subscribed ones. Every workshop item has its own steam page, go there to give feedback or any other info to the level creator.

New Level from Numantian: The 50 Days Challenge!

One of the features of the level editor is that you can make the game generate a random Survival map and then modify the events, scripting and narrative to bring a new survival experience to the player. We have created "The 50 Days Challenge" which is a survival game with just 50 days to build your colony before the Final Swarm arrives. But don’t despair, you will not be alone in this task. The neighboring colonies and the New Empire will try to keep you from joining the hordes of infected by sending help periodically. Hope you like it! It’s a super fast game and a real challenge!

The Custom Levels Editor

There are three ways to launch the Editor: - From the game main menu, go to More => Launch Editor - Or just press and hold the SHIFT key when starting the game and the editor will be launched automatically. - In the installation folder you have a LaunchEditor.bat you can use to launch it directly. These are the main features of the level editor:

  • Map creation can be manually crafted or let the game generates a random survival map when the game starts.
  • Custom events.
  • Custom scripts to enhance the narrative.
  • Advanced ZXCode language (variables and functions) to create complex gameplay mechanisms.
  • Multi-language support.

Of course, it will be updated periodically to include more features to create. One of the upcoming big features will be custom modding of game rules (units, structures, stats...).

The Level Editors Guide

Before playing with the editor we strongly recommend you read this short guide we have prepared. Here it is: TAB Editor Guide

Forum & Support for the Editor & Workshop

Please, use this forum for all related info about the editor and workshop, comments, feedback, new features or bugs reporting. Also we will update there the development progress and version changes log. They Are Billions Workshop Forum

The Campaign

Now that the editor is ready, we think it can expand a lot the content of They Are Billions so we can focus on finishing the campaign mode. We know all of you are asking us for the estimated launch date but we cannot give an answer yet. We would like and we will try with all our workforce to release the campaign on next Spring 2019. At the same time we will improve the Survival Mode with two new Map Themes and expanding the features of the editor to allow you to create even more awesome levels. And that's all! We hope the editor will bring lots of fun and surprises for the great community of They Are Billions players.

See you soon!

They Are Billions Update: New Version 0.9.2

They Are Billions Update: New Version 0.9.2


They Are Billions 0.9.2 game update includes: new achievements and custom keys. There will be a new Game Editor in the next couple of weeks. Learn more!

They Are Billions Update: Campaign Development I

They Are Billions Update: Campaign Development I


Our latest They Are Billions update includes talk of our campaign missions and the announcement of our upcoming game editor. Learn more here.

They Are Billions Update: Something Giant is coming!

They Are Billions Update: Something Giant is coming!

News 1 comment

The latest update includes: a new zombie type the Infected Giant, Nightmare mode, new map features, armor system refactored, and a few more achievements.

They Are Billions - Development Update v.0.8.2

They Are Billions - Development Update v.0.8.2

News 1 comment

We are working now in two fronts, the Old Fortresses and the Trains system. As we said before we want to keep on trying to enrich the content of the Survival...

Add file RSS Related Files


Turkish Patch 3 comments

Çeviri devam etmektedir. Donanım Haber forumundaki konusundan da takip edebilirsiniz.

Comments  (0 - 10 of 12)

This game seems very cool, it deserves to have multiplayer.

Reply Good karma Bad karma+2 votes

This comment is currently awaiting admin approval, join now to view.


Definitely voting for this amazing thing. I don't have it yet, but **** me if I don't plan to get it in the future. When I'm not poor!

Reply Good karma Bad karma+3 votes

awesome! :DDDDD, wil be free2play?

Reply Good karma Bad karma-1 votes

This comment is currently awaiting admin approval, join now to view.


I'm still enjoying Lords of Xulima. This looks amazing! Can't wait...

(Buena suerte gente, que no es facil desarrollar juegos en la tierra de Cervantes :p)

Reply Good karma Bad karma+2 votes

When I get muns I'm probably gonna snag the best edition. This game looks great!

Reply Good karma Bad karma+1 vote

Looks cool, take our money and give us early access now!;-)

Reply Good karma Bad karma+1 vote

Definitely excited about this one

Reply Good karma Bad karma+3 votes

A zombie rts game, cant wait! I like that they are billions and there are far far far far less humans AND it looks steampunky to boot! Oh and did i mention ITS A ZOMBIE RTS GAME

Reply Good karma Bad karma+3 votes
Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.

Follow Report Profile
They Are Billions
Developer & Publisher
Numantian Games
Send Message
Release date
Game watch
Community Rating



3 votes submitted.

You Say


Ratings closed.

Single Player

Latest tweets from @numantiangames

RT @steam_games: 🔹 DAILY DEAL 🔹 Save 25% on They Are Billions 🔍 Learn more: #SteamDeals @NumantianGames

Nov 30 2018

They Are Billions Update: Workshop & Editor Available Now!

Nov 29 2018

Our friends at @arK_thegame have launched their Kickstarter project: The Waylanders, a party-based RPG. We have alr…

Oct 24 2018

They Are Billions Update: New Version 0.9.2

Oct 20 2018

RT @theyarebillions: The stream for They Are Billions has begun!! Join @stoicstudio , the creators of @BannerSaga as they stream They Ar…

Oct 19 2018

Latest development update for They Are Billions! #gamedev #theyarebillions

Sep 27 2018

RT @theyarebillions: Our latest update includes: a new zombie type the Infected Giant, Nightmare mode, new map features, armor system re…

Aug 6 2018

RT @theyarebillions: Development Update v.0.8.2 New army buttons and improved traps. We also talk about including trains! Read more here…

Jun 7 2018

RT @theyarebillions: They Are Billions Now Has A Ton Of Cool New Buildings #gamedev #theyarebillions

May 11 2018

Embed Buttons
Link to They Are Billions by selecting a button and using the embed code provided more...
They Are Billions
Last Update
91 members
You may also like
Universe at War: Earth Assault
Universe at War: Earth Assault Real Time Strategy
Supreme Commander 2
Supreme Commander 2 Real Time Strategy
Dawn of War: Dark Crusade
Dawn of War: Dark Crusade Real Time Strategy
Battlefleet Gothic: Armada
Battlefleet Gothic: Armada Real Time Strategy
Star Trek: Armada II
Star Trek: Armada II Real Time Strategy