Propagate is a free, AI-driven browser farming simulation (sim game) played on desktop or tablet. Every farmer is an autonomous agent, grown procedurally with rolled ability scores and a real personality: they till fields, form bonds, barter goods, invent recipes, hold elections, and stand watch against orc raids — all rendered in pixel art under a CRT shader. Found a human town or an orc war-hoard; your town persists in your browser and remembers itself, greeting you with a "previously on" catch-up when you return. A world that remembers itself.
Made by Ryan Haigh. Released July 30, 2026. Also known as the Propagate game or Propagate farm sim.
Is Propagate free to play? Yes — free in a desktop or tablet browser, no download, no account, no ads. Does Propagate use AI? Yes, in the classic sense: every farmer is an autonomous agent whose rolled stats and personality drive its decisions — an agent-based simulation. It does not call large language models during play; the simulation is deterministic and runs entirely in your browser. Can I lose my town? It persists in your browser's local storage — clearing site data erases it, otherwise it waits and recaps what happened while you were away. Is it multiplayer? Single player, in a world of neighbouring towns your town can encounter, raid, and remember.