
They Are Billions
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?
What it feels like
Sustained edge-of-seat pressure where waves of billions of infected feel imminent and devastating. An unflinching darkness of human extinction and brutal survival permeates the world.
What it's about
An undead outbreak of billions of infected creatures is the core existential threat. Survival amid the ruins of civilization on a post-apocalyptic planet is the foundational setting. Enduring waves of hostile infected seeking to destroy remaining human settlements is the central struggle.
How it plays
Real-time strategy commanding of economies, defenses, and unit placement is the core loop of colony management and survival. Constructing and expanding a functioning human colony with buildings and infrastructure is the defining gameplay focus. Placing defensive structures and managing perimeter barriers to repel waves of incoming infected is central to survival.
How it looks and sounds
The game employs an isometric fixed-angle perspective for viewing and managing the colony. Steampunk aesthetic with industrial machinery and retro-futurist design elements shape the visual identity.
How it's structured
Designed as a single-player experience focused on solo colony management and defense. Gameplay continues indefinitely against escalating waves until the colony falls, chasing survival as long as possible. Campaign maps are deliberately authored by designers, though a level editor allows player-created content.
Kindred games
Shares Real-Time Strategy, Tower Defense, Resource Management, Base Building.
Both lean into Real-Time Strategy, Tower Defense, Resource Management, Base Building.
Shares Zombie, Survival Against Nature, Post-Apocalyptic, Tense.
Both lean into Single-Player, Zombie, Survival Against Nature, Tense.
Shares Real-Time Strategy, Post-Apocalyptic, Base Building, Resource Management.
Both lean into Real-Time Strategy, Post-Apocalyptic, Base Building, Resource Management.
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Closest hidden gems
A lesser-known kindred — Real-Time Strategy, Tower Defense, Resource Management, Base Building. 96% positive across 4,811 Steam reviews.
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Both lean into Post-Apocalyptic, Resource Management, Single-Player, Colony Sim.
A lesser-known kindred — Real-Time Strategy, Tower Defense, Tense, Resource Management. 87% positive across 4,686 Steam reviews.
Both lean into Real-Time Strategy, Tower Defense, Single-Player, Tense.




