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.

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they are billions trains campaign

Today we would like to tell you a bit more about some of the upcoming features of the Campaign: The Train and the Research System.

The Train

During The Campaign you will mostly have to deal with reconquering a big territory currently occupied by the infected. In this future world there is just one city standing: Empire City, where most remaining humans live. At the beginning of the game, the Emperor commands you with the task to expand the empire throughout the infected territory. You’ll have to build colonies that will be connected by a railway network.

In the campaign, the train will always play a role in the colony-type missions. In these maps the Command Center will be located next to the railway tracks that will run across the map.

The train convoy will arrive at the colony once a day with a payload of colonists from Empire City to populate the colony. Therefore, in the Campaign, houses will initially be empty and "disabled" until the colonist arrive.

As well as adding realism and coherence with the game story and the style (steampunk), the train enhances the gameplay mechanism:

Structures cannot be built on top railway tracks:
That's something obvious of course, but it presents a new challenge to both expanding and protecting the colony. Colonies will always have those open gaps for the infected to sneak in. Make sure you place your units and towers to defend them well.

The train can destroy the infected:
The train will destroy all infected units that cross paths with it! But don't worry, your units cannot be harmed. They will just be pulled apart and let the train pass. This feature can be used to your advantage.

The Train won't come to the colony while it is attacked by a swarm:
So the train will delay its arrival the next day.

Colonists just arrive to the colony once a day:
So you should take this into account when deciding when to build houses, or other buildings.

You can upgrade the train by researching specific perks in the Research Tree:
So when it comes to the colony it will bring not just colonists, but also resources and gold.

The Research System

During the campaign you will have access to the Research Laboratory in between missions. There you can use the Research Points you have won by finishing missions, or found while exploring the Old Fortresses.

The Research system will have a really big impact on the gameplay. Consider that in the beginning of the Campaign you’ll start with a very low level of technology that will allow you just to build these elements: Tent, Wood Wall / Gate, Mill, Tesla Tower, Quarry, Sawmill, Fisherman and Hunter Cottages and the Ranger. And by contrast, at the end you may finish with highly sophisticated units and buildings that will allow you to develop much more powerful colonies than the current ones in the Survival Mode.

The Research Tree has more than 90 research perks. Some of them will allow the unlocking of new buildings or units. Others consist on upgrades for buildings / units, or general improvements for your colony. There will be a great variety of them, so every player can have a unique experience while deciding how to evolve their colony. It won't be possible to research all the perks in the tree, so make sure your research strategy matches your playing style!
But don't worry too much about whether you are choosing the right perks. The missions will be very open and can be played in different ways. As in the Survival mode, you will need to adapt your colony for every challenge. But also, you will always have several missions available so you can decide to play them in the order that better fits your technology level.

Here you have a preview image, sorry about it being in Spanish, we will translate the Campaign when is fully completed.

By the way, the current mayors system of the Survival Mode won't be available for the Campaign as their bonus and features interferes with the Research System that will be much more complex and deep and leave the Mayors system just for Survival and Custom Maps.

Some more features for the Editor (V. 0.10.16)

We have just updated the version, fixed some reported bugs and also added a few more elements, taken from the campaign, to enrich your custom levels gameplay and narrative.


You can place signs in the map to show more information (names, warnings...) about regions of different parts of the map. They are activated by units (with right click as any other interactive element).

Multi-purpose Machines: The Communicator and the Transmitter

You can place these machines in the map and set an script that will be executed when a unit interact with the machine (right click). These elements are useful when you need to trigger an event in an specific moment (instead of automatic events), and when a unit reaches that point in the map.
For example, you can now create more tactical maps where the player must reach and activate those landmarks to win the game.

And that's all for now. In the next update we will talk about the World Map and Missions!

See you soon!

They Are Billions Update: The Campaign, Level Editor, Survival Mode

They Are Billions Update: The Campaign, Level Editor, Survival Mode


Progress continues on the They Are Billions campaign mode while the level editor & survival mode to receive more updates, including new maps and mod game...

They Are Billions Update: Workshop & Level Editor Available!

They Are Billions Update: Workshop & Level Editor Available!


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...

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.

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Comments  (0 - 10 of 13)

Hello: I have writen about THEY ARE BILLIONS in a Spanish translation of the best indie games of 2018:

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

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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!

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awesome! :DDDDD, wil be free2play?

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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)

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

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

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Definitely excited about this one

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They Are Billions
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Numantian Games
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Feb 27 2019

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They Are Billions Update: The Campaign, Level Editor, Survival Mode

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

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