NPCAgent
About NPCAgent
NPCAgent is a text-based sandbox by DigitalDreamer, built in HTML. The game follows three NPCs in a town containing a park, a home, and a cafe. There are no quests or story flags. They receive $10, an energy bar that drains, and only keep memories written in a diary before sleeping. Each turn, one AI answer decides what each character does next, so they can work, buy meals, talk, lie, hold grudges, age, and die. Money is the only scripted pressure, because the cafe job controls access to income.
The current v0.9.2 release, dated July 30, 2026, is still in development. It runs in browsers on Windows, Linux, Mac, and Android, in English, without censorship. The latest update added reproduction, including pregnancy and birth, with newborns becoming agents that grow. It also added three run modes: ChatGPT/Codex, a free no-key tier, or local GGUF. Rewind lets you edit an NPC’s past line and continue. Saves can resume and export as ShareGPT data. A diary memory bug was fixed.
Developer's description
Three NPCs wake up in a town with a park, a home and a cafe. No quests, no story flags. They get $10, an energy bar that drains, and they forget anything they didn't write in their diary before sleeping. They work the cafe counter, buy meals, talk, lie, hold grudges, fall for each other, have kids, get old, die. I scripted none of that. Each one is a LLM answering one question per turn: “what do you do next.” Money is the only pressure I put in. Corner the one paying job and the others have to come to you to eat...
NPCAgent screenshots
Download NPCAgent v0.9.2
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