Prairie Engine
A simulation engine for language models.
Write a specification. Run a world.
Context creates curvature
Prairie Engine turns a language model into a stateful simulation. Each simulation is defined by a context layer: a structured specification that describes a world, its rules, its entities, and its constraints. Load a different layer, get a different world. Same engine.
No training. No fine-tuning. No custom models. One text file, loaded into context. The engine handles the rest.
Shipping today
Each game is a different context layer. Different world, different rules, same underlying system. Playable now in the arcade.
Starfall Legion
Deep-space fleet command. Five ships, 4,074 crew. Boarding parties, railgun volleys, fighter wings. Every decision costs something.
Dominion
Medieval kingdom management. Treasury, military, populace, loyalty. Balance them or lose them. Every choice trades one against another.
Pleb Life
Ancient Rome from the bottom. Survival when you own nothing and nobody knows your name.
King’s Dilemma
Moral choices with no right answer. Rule a kingdom where every option has a cost and every cost has consequences.
Any domain where state evolves
The engine is domain-agnostic. Write a context layer for any setting where decisions have consequences and state changes over time. The same architecture that runs fleet combat runs enterprise training.
Crisis response training
Hospital overflows. Supply chains break. Decisions cascade. The simulation tracks every variable and produces a full state history for debrief.
Courtroom simulation
Depositions, cross-examination, objections. Witness agents with consistent testimony, motivation, and memory across the entire proceeding.
Market modeling
Autonomous agents that trade, react, and adapt. Inject shocks. Observe how cascades propagate through the system.
Negotiation training
Counterparty agents with hidden interests and constraints. Run the same deal a hundred ways. See where each path leads.
Organizational dynamics
Restructuring, policy changes, leadership transitions. Model how decisions propagate through a system of agents with their own goals.
Multi-agent advisory
CFO, COO, Risk Officer. Each sees a different projection of the same world. Each proposes. The engine reconciles into a single outcome.
Also: education simulations, synthetic data generation, process modeling, scenario planning, and anything else that can be specified.
Sovereign
Grand strategy across 12 eras with 35 civilizations. Every leader is an autonomous agent that reasons about diplomacy, war, and trade. One engine call per turn governs the entire world.
One specification. Any world.
Prairie Engine is a simulation engine for language models. No training, no fine-tuning, no custom models. One text file turns any frontier model into a persistent, stateful simulation.
Write a specification. Load it. Run a world.