Hearsay: An AI Murder Mystery Powered by FalkorDB | Graphs, Rumors & MCP Agents

What if every villager had their own memory, every rumor changed as it spread, and every lie left a trail? Meet Hearsay, an AI-powered murder mystery built with FalkorDB, where ten villagers, one body, and a web of evolving rumors stand between the detective and the truth. Unlike traditional games, Hearsay has no pre-written dialogue. Every answer, rumor, contradiction, and clue comes from a Cypher query running against the game's graph database. What makes Hearsay different? 13 FalkorDB graphs per game: A world graph, a village graph, a detective's case graph, and individual memory graphs for every villager. Independent character memories: Each villager only knows what's stored in their own memory graph. No agent can access the hidden truth. Dynamic rumor propagation: Villagers exchange information, and details can change as rumors travel from person to person. Traceable information: Follow every rumor back to its source and discover exactly where the story changed. Cypher-powered investigation: Detect conflicting alibis, uncover lies, and check whether a suspect could physically travel between locations in time. Graph algorithms in action: PageRank identifies influential villagers, while community detection reveals social circles. An AI detective powered by MCP:** Inspector Graves investigates through 14 tools, from interrogating witnesses to tracing rumors and ranking suspects. Explainable AI: Every tool exposes the Cypher query it runs, while guardrails stop the language model from inventing evidence. The real challenge isn't just finding the murderer. It's figuring out who knows what, who told whom, which details changed, and which statements the evidence can actually support. By combining graph databases, AI agents, rumor propagation, and evidence-based reasoning, Hearsay explores a different way to build interactive stories where memory matters and every lie has a history. Take FalkorDB away, and there is no memory, no rumor, no trail, and no case. Can you solve the mystery? #FalkorDB #GraphDatabase #AI #AIAgents #MCP #Cypher #GraphTechnology #GenerativeAI #BuildInPublic #GameDevelopment