They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
Recent Reviews:
Very Positive (191) - 81% of the 191 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (11,615) - 85% of the 11,615 user reviews for this game are positive.
Release Date:
Dec 12, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“This game has two game modes: Survival and Campaign. As the Survival mode is already fully playable, we think it is a great idea to let the players play it and take their feedback to improve the game while we work in the Campaign mode. All the feedback and improvements will be applied to the Campaign too.”

Approximately how long will this game be in Early Access?

“As this game can be expanded in a lot of ways, we will keep it as Early Access as long as needed. With that said, we expect to finish the Campaign mode in 2019.”

How is the full version planned to differ from the Early Access version?

“The Early Access game will start by including the Survival Mode. In several months, we will include the Campaign mode, the story mode, with hand-crafted levels, crazy NPCs, and lots of other fun features! The final release will include both the Survival and Campaign mode.”

What is the current state of the Early Access version?

“The Early Access game now contains the Survival Mode. In this mode, a random world is generated and the player must create a colony that can survive in an apocalyptic world for a set period of time.”

Will the game be priced differently during and after Early Access?

“Early Access will be cheaper than the final release. However, we have not finalized the price for the final release.”

How are you planning on involving the Community in your development process?

“We plan to be extremely involved with the community. We love community feedback! We already did this with our last game Lords of Xulima.”
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Recent updates View all (25)

February 27

Campaign Development (II)


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 in the gameplay. Consider that in the beginning of the Campaign you’ll start will 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 an 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!
109 comments Read more

January 16

Development Update


First of all, happy New Year! We hope your New Year is off to a good start. We’re very grateful for how exciting last year has been for our studio. There are big plans for this new year and we are sure that it will be too for the great community of They Are Billions. Now, let's talk about the development of TAB, What are we working on right now?

The Level Editor

We continue expanding and improving the game level editor as it has proved to be very successful amongst the community. There are already more than 500 levels published, some of them really complex and sophisticated. We're amazed of what you’ve achieved so far, thank you very much guys!

Step by step, we will include more and more features, assets, and interesting new elements to enhance your awesome designs. Some things we are working on are the modding of game rules (all the game stats and parameters), new interactive assets, and more ornament assets to decorate your levels.

Also we are going to allow users to create campaign-like series of levels where the player must play them in order, so they need to finish the first one to unlock the second, and go on. That will be very useful to those great series you are creating so you can make sure the player is following the levels and the narrative in the order decided by the designer. We are also considering to incorporate some kind of persistent state through the series that can be used to create things like branched stories.

The Campaign

This is the big challenge for this year! We know you have lots of questions about it, let us answer some of the most common ones.

What happens with the Campaign, Why it is so delayed?

First, let me say that we really understand your impatience. The launch of the Campaign has been delayed from our first estimations, so we fully understand you can be a bit disappointed. But, be aware that all this extra time means that we are developing a much more ambitious Campaign than we originally planned. Given the success of TAB, we feel the responsibility to develop the best possible game. We've just got one chance to release the full finished game, and we would honestly prefer to be known as the ‘slow developers’ that have released a great RTS, than the ‘rushed developers’ with an average game.

Think that the Campaign is going to be like a new full game with 40-50 hours of content! We have literally created hundreds of new graphics for the Campaign. Indeed, the investment in the Campaign has been much larger than for all the Survival Mode.

When can we test and play the Campaign?

We’ve decided not to partially release the campaign under Early Access, but release it fully at the same time that we officially launch the game out of Early Access. We will perform all the testing internally here with our team of testers and, of course, we will keep on updating you about the campaign details here. We believe is better not to release the campaign "in pieces" as it would delay the development, and it would spoil everything. We want to surprise you with the full Campaign :)

Will the Survival Mode be expanded?

Yes. The current Survival Mode will receive two new map themes very soon. One will be the easiest one, and will be the first to be played, and the other that will become the hardest one to play, even more than the Desolated Wasteland. These will the biggest expansions to the Survival Mode until the Campaign is finished. We will give you more details about them in the next update.

Will there be more units in the game?

Definitely yes. We have already several new infected ready and, right now, we are working on the Empire Heroes. All of them are been reserved for the Campaign. There will also be new upgrades that players can research in the Campaign, like the Laser Titan. Once the Campaign is released we are thinking about adding new game modes and integrating some elements of the Campaign to the Survival. That’s the future we are working on!

And here some more images from the Campaign, hope you like them:

Next update we will talk about the Research System in the Campaign. See you soon!
188 comments Read more
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About This Game

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.

Survival Mode - Available Now!

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 a specific period of time 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!

Future Game Mode - Campaign

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. We are working right now on the campaign and we expect it will be available for Winter 2018. The campaign will be included for free to all the buyers of the Steam Early Access version.

System Requirements

    • OS: Windows 7, 8, 10 (32 and 64 bits)
    • Processor: INTEL, AMD 2 cores CPU at 2Ghz
    • Memory: 4 GB RAM
    • Graphics: Intel HD3000, Radeon, Nvidia card with shader model 3, 1GB video ram.
    • DirectX: Version 9.0c
    • Storage: 4 GB available space
    • Additional Notes: Minimum resolution: 1360x768, recomended FULL HD 1920x1080.
    • OS: Windows 7, 8, 10 (64 bits)
    • Processor: INTEL. AMD 4 cores CPU at 3Ghz
    • Memory: 8 GB RAM
    • Graphics: Radeon 7950 or above, Nvidia GTX 670 or above. 4GB video ram.
    • DirectX: Version 9.0c
    • Storage: 4 GB available space
    • Additional Notes: 4K Monitor (3840x2160)

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