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They Are Billions

Numantian Games

Strategy · Base-Building · Colony Sim · Zombies

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They Are Billions cover art
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Screenshots and trailers.

ATLAS RECAP

How it plays.

Start with a small colony and turn nearby terrain into a defensible perimeter. Workers, food and power compete for space as you push outward for resources. Between scheduled hordes, roaming infected can slip through a weak spot and turn your own buildings into a fresh source of enemies.

Good fit if

You like base-building under pressure, setting up chokepoints and deciding how much territory you can defend.

What to know before playing

Survival maps are the clearest introduction to the colony loop. The campaign mixes colony missions with hero missions, and a breach can erase a long stretch of progress.

Game Atlas field notes · Gameplay source ↗

ONE SITTING

About 35 minutes · Grow an existing colony through a stretch of the survival scenario, then save.

Activity source on Steam ↗

Find more games for tonight ↗
  • Strategy
  • Base-Building
  • Colony Sim
  • Zombies
  • Survival
Steam edition details

Listed systems · Windows

Listed play modes · Single-player

  • Base-Building
  • Colony Sim
  • Strategy
  • Zombies
  • Survival
  • RTS
  • Tower Defense
  • City Builder
  • Steampunk
  • Building
  • Post-apocalyptic
  • Singleplayer
  • Resource Management
  • Real-Time with Pause
  • Difficult
  • Tactical
  • Management
  • Indie
  • Isometric
  • Multiplayer

UNDERSTAND THE GENRES

STOREFRONT EDITIONS

Where to play.

STEAM · GREECE

Price history.

Recorded euro prices from Steam checks, starting .

Lowest recorded · €29.99

Recorded changes (1)
  • €29.99

DOCUMENTED EDITIONS

Release history.

PlatformMarketDateEvidence
Steam (PC)Store listingSource ↗

Reviews & ratings.

How to read these ↗

Player ratings

Steam player reviews

85% positive

46,401 reviews · Steam storefront summary

Captured 6 Nov 2026, 18:51 UTC

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IGDB community rating

73 / 100 · 63 ratings

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Critic coverage

Metascore for the Steam edition

77 / 100 · Pinned Steam catalog

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Outlet reviews

Review collections

OpenCritic link matched via Wikidata ↗

IGDB critic aggregate

76 / 100 · 7 external critic ratings

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Play activity and charts

Browse charts ↗

1,622 on Steam at capture
6 Nov 2026, 20:26 UTC

IF THIS CLICKS

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