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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What the hell is "They Are Billions?"

  • It's an isometric, real time strategy (RTS) game where you control a colony of humans who are fighting to survive against The Billions -- A huuuggggeee horde of Zombies.
  • The game is well known for its crazy level of difficult, and requires a lot of skill to play, however, the difficulty can be dropped greatly to assist with those who are newer to RTS titles.

So why a level editor, and what is it?

  • There are 4 scenarios built into the game, and for each scenario, you get a randomly generated map to play on. This gives a decent amount of variety on maps to play, but really isn't enough to satisfy us modders!
  • They level editor allows you to take any save file associated with the game, load it up, and make changes to the layout, and even change some of the rules / game play, for example, you can define custom waves, allowing for much more varied game play.

Tell me more -- How do I use it?

  • Well first of all, if you haven't already, Grab a copy of the game and install it.
  • You can access and fully use the level editor in your browser,
  • Simply click hereYou can choose to either upload one of your save files, or use one of the built in templates, make sure you read the next section for more details!
  • The editor is fan made, and is always subject to "break" after any given update to the game, so be aware that every update for the game that rolls around might (and sometimes has) a chance of breaking the level editor. This is the unfortunate side to this being fan project.

We've created a tutorial to go through the step by step process of making a map, and we even try out the map after that. The only thing to keep in mind is that loading custom maps after the recent 0.6.0 update has changed a little, there's more details after the video:

Help! My save doesn't load, and I can't use my edited level in the game!

  • Don't worry, we've got your back! Ever since version 0.6.0 of the game, the game devs have been trying to do their best to prevent cheating, and as such, they've made it more difficult to load custom maps -- this is a single player game, so it's not a big deal that we are making custom maps to share with our friends.
  • If you're trying to edit a recent save file (after 0.6.0 update), you'll need to remove the password from it, at this stage, the actual editor itself can't do this (although we're looking for a way to do this).
  • In the mean time, we've written a tool which will figure out the password for your save file.
  • Follow this tutorial to decrypt 0.6.0 or newer save files.If you're trying to load your edited map back into the game, and your save file is invalid, Follow this tutorial to load your save files in version 0.6.0 or newer.

What are the current features, as of today?

  • Template maps, sized: 256, 384 and 512;
  • Editing Terrain, Objects, Zombies, Entities, Fog of War, Roads and extra entities visually;
  • Ability to manipulate the terrain including placing Earth, Water, Grass, Sky, and Abyse;
  • Ability to place resources such as Mountain, Wood, Gold, Stone, Iron and Oil sources;
  • Ability to place all entities, and even modify some attributes on entities;
  • Ability to let player start with "bonus entities" which are essentially free units or buildings;
  • Ability to edit basic map settings such as the map name and theme (4 themes to pick from);
  • Basic editing features such as different tools, and the ability to undo and redo map drawings; and
  • Grid settings to line up tiles / entities.

I want to start modding, how did you even do this?

What challenges could you possibly face?

  • We're facing an interesting situation -- You look on the steam forums and people are asking for a level editor, people are asking for mods, people clearly want exactly what we are making -- HOWEVER -- the developers of the game don't seem to want to allow us to mod the game.
  • This has been a huge challenge because the developers will try to intentionally break the level editor, however, it's been a fun ride trying to bypass any and all obstacles they place along the way!
  • Most notably, the devs of the game started to password encrypt save files and resources files -- it took us less than 2 hours to crack the protection mechanism, which we felt was a rather impressive effort.
  • They are billions is also an Indie title -- this means the modding scene is SMALL -- We had to build everything ourselves, perform all the research ourselves, and figure just about everything out ourselves. We've of course had help from other modders in the community, most notable of which is "Endangered Tortise" who helped greatly shape the editor.

Can I have the source code to your level editor?

Do you have any other projects? How can I follow you or give you ideas?

  • We've only recently started documenting our modding (we plan to document via videos a lot more these days!), although we've been in the modding scene for years, if you'd like updates on this level editor, and want to watch us built mods for others games, and if you enjoy gaming content in general
  • Subscribe to AzzaFortysix on YouTube. Feel free to drop us comments, ideas, suggestions, we'll read everything you post and share with us, especially if you share directly on one of our videos on AzzaFortysix's YouTube channel.

What do you see for the future of modding in They Are Billions?

  • I'd love to see the modding scene really pickup, I think the game has a huge amount of potential, and hopefully the developers will come to see how much more their game could shine if they allow the community to build mods for it -- look at something like MineCraft -- modding has made that game huge -- imagine if we could do that here!
  • Hopefully we get an official level editor -- the main thing for me is that I've enjoyed building the level editor, been enjoying documenting and sharing the process via videos, and I've learnt so very much while building it.

What do I get for reading your whole article?

  • You get a a thank you -- Thanks a lot for reading this, once again, if you do have questions, suggestions or anything, feel free to reach out to us, we're happy to chat :)
 “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...

They Are Billions - Multi-language Support: Spanish Available

They Are Billions - Multi-language Support: Spanish Available


RTS game They Are Billions is now translated into the Spanish language. More language translations to come.

They Are Billions - Survival Mode Available Now

They Are Billions - Survival Mode Available Now

News 1 comment

They Are Billions Survival Mode is available on Steam! Immerse yourself in this Steampunk Zombie strategy game. Learn more about the Survival mode & EA...

They Are Billions Coming Soon to Steam Early Access

They Are Billions Coming Soon to Steam Early Access


Real-time strategy game They Are Billions is coming soon to Steam Early Access with the addicting survival mode. Get ready to play the game everyone is...

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Comments  (0 - 10 of 14)

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

Reply Good karma Bad karma+1 vote

If you’re looking to play some custom content for the game, check out the community made level editor, which allows you to make custom maps.

Here’s a link to a video about the level editor:
Here’s a link to a video that shows off one of the community made maps, which features an endless mode:

Reply Good karma Bad karma+1 vote
INtense! Staff

Is there a way we can get this hosted here? We'd love to see custom maps!

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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!

Reply Good karma Bad karma+2 votes

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)

Reply Good karma Bad karma+2 votes

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

Reply Good karma Bad karma+1 vote

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

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They Are Billions
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Numantian Games
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Latest tweets from @numantiangames

They Are Billions Update: New Languages and The Community Challenge #TheyAreBillions

Jan 26 2018

They Are Billions has reached 500,000 players! @theyarebillions Thank you for all of your support. We're still hard…

Jan 19 2018

RT @theyarebillions: New house models coming soon. #TheyAreBillions #gamedev

Jan 18 2018

RT @theyarebillions: They Are Billions Beginner Tutorial by Misa Perfect - Second Nature Gaming #TheyAreBillions

Jan 15 2018

RT @theyarebillions: 'They Are Billions' Resurrects Real-Time Strategy in Spectacular Fashion #gamedev #TheyAreBillions

Jan 10 2018

They Are Billions Update: Multi-language Support - Spanish Available

Dec 29 2017

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