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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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I hope you’ve had a great summer! It’s been a while since our last update. It’s not only because even the most devoted developers need to take a break sometimes, but mostly because we’ve been working hard on the game, making big changes as we develop the Campaign Mode. This, unfortunately, has prevented us from updating the Survival Mode with new content for now.

So with this post, we would like to inform you on the game development and what we’re currently working on.

The Campaign
When we originally envisioned They Are Billions, the Campaign was the main gameplay mode and the Survival was just conceived as a quick game for fun, played in a random scenario, that allowed us to test and balance the game. We decided to release it in Early Access on Steam at the end of last year, as the players who played the Survival Preview (the backers) loved it. To our surprise the success of the Survival mode was so great that we decided to improve it over time, as you surely know, by continually adding content and putting a lot of work on it. But then... what’s happening with the Campaign?

We’re now in a paradoxical situation in which the development of the Survival takes time away from developing the Campaign and vice versa. And both modes need to grow together since they have the same core. Otherwise, we’d end up having two different games. So now, it’s the Campaign’s turn, which is also a good thing, as we’ll include many of the features implemented in the Campaign to enrich the Survival Mode.

And How is the Campaign development going?
The Campaign development has been much more time consuming than we anticipated. We’re committed to delivering a great Campaign and not just a bunch of survival scenarios that you have to play in sequence. We want to add there all that is lacking in the Survival Mode, to have a perfect and rounded experience.

In the Campaign you’ll have a big World Map where you’ll be able to choose what kind of missions to play to reconquer a big territory from the infected. Every mission accomplished will unlock new missions, but be careful because infected swarms will block your path to new territories. You’ll have to destroy them with your personal Imperial Army.

These are the kinds of missions you’ll encounter:

- Colony Building: In this mission you have to build a colony on an outdoor map and achieve specific objectives (resist X days, get X colonists, get X resources...).

- Swarm Attack: You’ll need to grow a big army for the Empire using your Empire Points to hire your troops. Lead them against the swarm that’s blocking your advance on the map and reach new territories where you can establish new human colonies.

- Old Fortresses: This is a tactical-based mission. You’ll explore abandoned human fortresses with just a few units. In these Fortresses, you’ll discover secrets and valuable artifacts that will grant you advancements in Science, Technology and the Empire. These will boost your Colonies and your Imperial Army.

The Old Fortresses missions are themselves like a whole new game that we think will improve and enrich the experience. You’ll have to venture into these infected places with only a handful of warriors (and a Hero, but we’ll talk about heroes later). To survive, use the environment to your advantage. These fortresses hold the keys to you finding out how the world fell to the infection, with lots of lore and many other surprises along the way.

We have now new artists creating hundreds upon hundreds of new graphic assets for the game. Here’s a taste of what the Old fortresses look like. We hope you like the atmosphere:

Incoming Game Editor
We expect to release a game editor soon, so players can create and share their Survival maps with other players. This will be officially supported and will be integrated with the Steam Workshop too. We’ll talk about it more in the next update.

And that's all for the moment. Keep on fighting for the humans!

See you soon!

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...

They Are Billions V 0.8 Update - The Six Wonders

They Are Billions V 0.8 Update - The Six Wonders


The Six Wonders are the biggest and most amazing ones you can build for the colony. But, as mighty as they are, they’re also really expensive to build...

They Are Billions - Development Update

They Are Billions - Development Update


As you know we are working on a big update for They Are Billions (V.0.8) with The Six Wonders, that we expect to publish on the 5th of May. Here are some...

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Comments  (0 - 10 of 12)

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

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

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They Are Billions
Developer & Publisher
Numantian Games
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Latest tweets from @numantiangames

Latest development update for They Are Billions! #gamedev #theyarebillions T.co

Sep 27 2018

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

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… T.co

Jun 7 2018

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

May 11 2018

They Are Billions is on sale this weekend for 25% off. Get it here on Steam! Store.steampowered.com #pcgamingT.co

May 5 2018

They Are Billions - The Six Wonders Youtu.be #gamedev #TheyAreBillions #videogames

May 4 2018

RT @theyarebillions: The latest They Are Billions Update: The Six Wonders!! Steamcommunity.com #theyarebillions #gamedevT.co

May 4 2018

RT @theyarebillions: We are gearing up for Version 0.8 - expected to be released May 5th. Take a look at the list of features we are wo… T.co

Apr 25 2018

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