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Aevum Realm Architect
Rise from serf to sovereign in a deterministic low-fantasy kingdom-builder. Download the files, load them into your AI, and play.
Aevum Realm Architect is a deterministic, low-fantasy kingdom-builder LLM RPG that runs on ChatGPT, Claude, or Gemini. You begin as a serf — one copper piece, no status, and a brutal medieval world that enforces rank at every turn — and work your way up through trade, war, and political intrigue to the throne of a realm.
The engine is two downloadable files: a master prompt (the rules and GM brain) and a nearly 30,000-word Realm Atlas (the world). The Atlas is the single source of truth — geography, economics, law, factions — and the GM is forbidden from improvising around it. That constraint is what makes Aevum feel like a real game rather than a story that quietly forgets itself.
The social architecture runs deep. In Al’thoria, rigid feudal hierarchy is the operating reality of your character’s life — a peasant who speaks above their station risks a flogging, not a stern look. In Njordheim, the same starting position plays completely differently: standing can be earned through deed and strength rather than birth. The friction changes faction to faction, and so does the game.
An Arcanum original. Free to download. Rukka’s design essay on the Deference Engine explains the philosophy behind the climb.