They Are Billions

Best Self-hosted Alternatives to They Are Billions

A curated collection of the 1 best self hosted alternatives to They Are Billions.

They Are Billions is a real-time strategy survival video game set in a post‑apocalyptic steampunk world. Players build and manage fortified colonies and defend them against large zombie hordes in campaign and survival modes.

Alternatives List

#1
Zero-K

Zero-K

Free, cross-platform open-source RTS featuring physics-based combat, terrain deformation, a large unit roster, and competitive multiplayer including co-op and campaigns.

Zero-K screenshot

Zero-K is a free, open-source real-time strategy game built on the Spring/Recoil engine. It focuses on large-scale battles with physically simulated projectiles, deep unit control, and extensive gameplay variety across singleplayer and multiplayer.

Key Features

  • Physics-based unit and projectile simulation affecting cover, dodging, and combat outcomes
  • Terrain manipulation (terraforming) including craters, ramps, canals, and fortifications
  • Large roster of varied units with distinct roles and abilities
  • Singleplayer and co-op campaign modes, plus survival-style PvE scenarios
  • Multiplayer modes including 1v1 ladder, team battles up to large team sizes, FFA, and co-op
  • Powerful in-game UI and advanced control tools (formations, queuing, automation helpers)
  • Modding-friendly architecture with extensive community-driven content

Use Cases

  • Competitive RTS play in ranked 1v1 and organized multiplayer events
  • Co-op matches against AI or survival waves with friends
  • Experimenting with modding, unit design, and gameplay scripting on a mature RTS platform

Limitations and Considerations

  • The game module repository does not include all associated infrastructure, tools, or artwork sources; additional components are maintained in other project repositories
  • Requires a compatible lobby/client or engine content setup to play

Zero-K is a long-running RTS project aimed at tactical depth and player control, offering robust multiplayer and meaningful singleplayer content. It is well-suited for players and modders who want a modern, community-evolved RTS experience with unusual mechanics like physics and terrain deformation.

788stars
239forks

Why choose an open source alternative?

  • Data ownership: Keep your data on your own servers
  • No vendor lock-in: Freedom to switch or modify at any time
  • Cost savings: Reduce or eliminate subscription fees
  • Transparency: Audit the code and know exactly what's running