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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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Just a quick update on the game development.

Campaign Development

We are working now in two fronts, the Old Fortresses, where the tactic missions will be played, and the Trains system. In the next update, we’ll talk more about them and we’ll publish new screenshots with new content.

Trains on Survival Mode?

As we said before we want to keep on trying to enrich the content of the Survival mode with elements from the campaign. Therefore we are also considering including the Trains in the Survival mode, but just as a new environmental element. There will be a railway line that will cross the map and, periodically, there will be trains passing through the map. It will not only be a nice touch for the maps, but also an important strategic element. Obviously, you won’t be able to build over the railways so you’ll have to defend that parts in a different way (without walls). On the other hand, the trains will destroy all those unlucky infected who happen to be on its way. That’ll certainly be something worth watching!

New Version 0.8.2
These are the new features of the 0.8.2 version, which is available now:

New Army Buttons

Many times in the game, you want to select all the units of the same type, for example, “Select all snipers to defend the North wall….”. There is a new button on the left part of the screen for every type of unit (Ranger, Sniper…) that also shows the total amount of each of them. Click them and all the units of that type will be selected.

You can combine the mouse clicks with the Shift key to add the units to the current selection.

Press F2 to select all the Army

You can use the shortcut F2 to select all units available in your army.

Power Plant Changes

Now the Power Plant uses 10 wood units instead of 5 wood and 5 stone. Before, building sawmills in the late stages of the game was something superfluous and by contrast, if you built several power plants you could easily run out of stone which is so necessary as the game progresses. We think that works much better now, as it improves the resources balancing especially in the second half of the game.

Stakes and Blades Traps

Judging by the screenshots and gameplay videos from players, it seems that the traps are underused. We think they are currently very useful, as they not only harm the infected but also slow them down. Another advantage is that they can be placed on the floor without restrictions and don’t block the movement of your army (as the walls do).

Also they would make more sense in real life, where a fortress would have one or two rows of walls with a gate protected by a series of traps. Building lots of walls randomly just to block the infected looks quite weird 🙂

So for all these reasons we have improved the traps:

Stakes Trap: +20% Life. + 25% damage.
Blades Trap: +30% Life. + 25% damage.

Pathfinding for Swarms: Improved Performance

There is a good reason why They Are Billions is clearly one of the games that manages more units in real time, units that are truly independent, every unit has their own AI and behaves always on their own. That’s the reason why the infected swarms in They Are Billions looks so natural and organic.

The game engine is ultra optimized in every aspect, especially the pathfinding, which is one of the most costly operations.

In many other games with big armies, the paths are computed for a full group of units and generally those paths don’t change with time as the environment is static and fixed. By contrast, on TAB every unit computes its own paths to reach its targets. This path is recomputed every few seconds to react to the changes in the environment (walls destroyed, structures built…). Thanks to that, the swarms can split into several paths or single units can leave the swarm if they have seen or heard something, as it would happen in real life.

Although the game system is already quite optimized, we have gone further. Previously, all paths were recomputed if anything on the map changed, which could lead to some frame drops when there are big swarms running to the colony. Now, only if something that can affect the current paths is changed the path is recomputed. For example, the infected don’t care about walls; they ignore them unless they are blocking their movement in which case they will try to destroy them. So now, if a wall in their path is destroyed or built the path won’t be recomputed.

What all of this stuff means to the player? We expect the game to run smoother, especially when big swarms are approaching the colony.

Survival Challenge: Score Factor fixed
It was an issue when computing the final score of the Survival Challenge. The Score Factor relative to the map type was not incorporated into the equation, so all score factors of the Survival Mode were 100% regardless the map type. Now that bug is fixed so your score will reflect better the real difficulty of the map.

And that’s all for now. Thanks for your support and see you soon!

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...

New Soundtrack and New Special Building Available!

New Soundtrack and New Special Building Available!


The latest version update for They Are Billions has included a newly orchestrated soundtrack and a new building: The Inn.

 “They Are Billions Update: New Languages and The Community Challenge”

“They Are Billions Update: New Languages and The Community Challenge”

News 1 comment

They Are Billions Community Challenge is live. In addition, the game can be played in Chinese (Traditional and Simplified), Korean, Japanese, Russian...

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Turkish Patch 1 comment

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.

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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

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 #pcgaming… T.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 #gamedev… T.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

RT @theyarebillions: The current weekly Community Challenge map is perhaps the most difficult one yet! * - 30% Energy * Two Villages of… T.co

Apr 13 2018

We are working on implementing a new feature where players can save and share a large image of their full colony an… T.co

Apr 9 2018

They Are Billions Update: New Soundtrack and New Special Building Available! Numantiangames.com T.co

Mar 26 2018

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