They Are Billions cover

They Are Billions

Critic score7 critics
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First release
Jun 18, 2019
Genres
Role-playing (RPG), Indie, Strategy, Real Time Strategy (RTS) · Science fiction, Survival
Platforms
PC (Microsoft Windows), PlayStation 4, Xbox One, Nintendo Switch 2

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?

Also known as Zombie Survival Colony Builder - They Are Billions, TheyAreBillions.exe

Attributes

No Attributes added.

Details

Storyline, release dates, time to beat, age ratings, modes, links, keywords

Release dates
PC (Microsoft Windows)
Jun 18, 2019
PlayStation 4
Jun 18, 2019
Xbox One
Jun 18, 2019
All 5 release dates
Nintendo Switch 2
Jan 22, 2026
PC (Microsoft Windows)
Dec 13, 2017
Time to beatIGDB · recorded
Main Story
68h
Main + Extras
93h
Completionist
162h
Game modes
Single player
Perspective
Bird view / Isometric
Keywords
zombies, post-apocalyptic, tower defense, difficult, steampunk
… All 8, base building, city builder, pre-release public testing

At a Glance

Critic Score
76
Main Story (IGDB)
68h
Main + Extras (IGDB)
93h
Completionist (IGDB)
162h
OverviewHow it playsMediaCommunityBehind the gameRelated

Overview

Steam review summary

Steam users rate this Very Positive, 46,311 reviews in all languages, recorded 16 October 2026

Valve's summary of Steam user reviews. Valve counts only reviews from purchases on Steam, not key activations, and leaves out review periods it has marked as off-topic. It isn't part of the CritScore score.

Review summary: SteamSteam data provided via the Steam Web API (opens in a new tab)Not affiliated with Valve →

About storefront and compatibility information

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