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!

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Today we are going to speak a bit about some of your best friends in the game. These are the three units you will first meet in the game. As all of them are mercenaries, you will have to pay them well if you want them to protect your colony. Also, you will have to deal with their tormented and extreme personalities, but what would you expect? After all, the world is doomed...

So you can understand the game icons, this is what they mean in order:
Armor, Speed, Attack Range, Damage, Attack Speed (shots per second)
Watch Range, Workers Used, Food Used and Gold Cost.


Even though this sadistic killer would be in jail in times before the apocalypses, they now are one of the best mercenaries you can rent. After all, the enemy of your enemy is your best friend. Snipers walk slowly and take their time to load their big rifle. However, Snipers have a very high attack range. With their incredible aim, they can kill most of the infected with just one shot to the head. Don't ask where they learned these skills... They are expensive and require you to build specific extensions in the Wood Workshop to craft their rifles, but believe us, they are worth every penny.


They are independent, brave and the most clever but, they don't like to accept orders. Don't think for a moment that you can give them an order without listening to a sarcastic answer from these girls. However, they are also the best survivors in this ruined world. They run extremely fast, faster than any other unit or infected (except the Harpy...). Also, they are silent. They can shoot their arrows with their steampunk bow without doing much noise. They are perfect for exploring the map and clearing small infected groups without attracting big swarms.


Soldiers are the only ones that have received military training. They are also diligent and courageous. They hate the infected and are the only ones that still believe that the world can be saved. They have a strong personality, but you can trust them. This versatile unit can serve any purpose. They wear heavy armor and wield a powerful sub-machine-gun. One of them can easily kill a group of infected, and a pack of them can defeat event the strongest enemies, but at a cost. Their noisy weapons can call the attention of the nearby infected. No unit is better to patrol and protect the colony walls.

Some words about the development

We are working now in the design of the campaign. We have added a lot of new features that will make the campaign a great single player experience. Also, we are designing it to be very dynamic, with lots of strategic options, a huge technology tree divided into five classes, and an engineering tree to craft new buildings. We want that every player play a different game in a unique mode. In the next update, we will talk more about the campaign.

And that's all for now.
See you soon!

Visit our Steam Store page of They Are Billions and add it to your wishlist!

They Are Billions - Plot, Campaign, and More!

They Are Billions - Plot, Campaign, and More!


Here is a look at the campaign, plot, zombie types, and more in our upcoming rts title, They Are Billions.

Revealing the They Are Billions GUI

Revealing the They Are Billions GUI

News 1 comment

In this article we reveal the GUI for the upcoming steampunk rts They Are Billions.

New Game: They Are Billions

New Game: They Are Billions

News 5 comments

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...


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

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Definitely excited about this one

Reply Good karma Bad karma+2 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+2 votes

Oh very interesting! Any idea on a price range?

Reply Good karma Bad karma+1 vote
NumantianGames Creator

Thanks for the comment! We're not sure on a price as of yet.

Reply Good karma+1 vote
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They Are Billions
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Numantian Games
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Our upcoming title: They Are Billions! #gamedev #rts #steampunk

Jul 8 2017

In our latest update we discuss the plot and campaign of our upcoming strategy game They Are Billions. #gamedev #rts

Jul 1 2017

Here's our latest update on the They Are Billions GUI. Check it out! #indiedev #gamedev #rts

Jun 9 2017

RT @nichegamer: They Are Billions Announced - A Ridiculous, Steampunk, Zombie-Survival City-Builder

Jun 2 2017

Thank you, PC Gamer, for the article on our upcoming game, They Are Billions! #indiedev #pcgaming

Jun 1 2017

We are excited to announce the latest project we have been working on all this time, They Are Billions. #indiedev

May 31 2017

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