Play instantly in your browser — or connect via MCP to play inside Claude and ChatGPT.
5 exclusive mystery themes, deeper suspect AI, extended case files. Works in browser & MCP. No subscription.
Case File No. 001
A procedurally generated murder has been committed.
Five suspects. Limited time. One chance to accuse. Interrogate witnesses, examine crime scenes, cross-reference evidence — and catch the killer before the trail goes cold. Every playthrough is unique.
Free to play · No account needed · 5 mystery themes
PromptPlay games run via MCP (Model Context Protocol) — the universal standard for AI tool use. Connect with a single URL.
One URL — no install, no npx, no API keys. Just paste it into your MCP client config.
Works with Claude Desktop, Claude.ai, ChatGPT, Cursor, or any MCP-compatible client.
Say "start a new murder mystery" and the AI becomes your game master.
Zero install. Works everywhere. Streamable HTTP transport.
Our growing library of AI-native games. Play in your browser or through any MCP client.
A bundle of word puzzles designed for AI. Wordle-style deduction, anagram unscrambling, and crossword trivia — with scoring, streaks, and rankings. How high can you climb?
Test your knowledge with rapid-fire questions on gaming, tech, and pop culture. Five questions, instant feedback — how many can you get right?
A fantasy RPG with branching narratives and procedural dungeons. Build your character, make choices that matter, explore a world that remembers — all powered by AI.
All games · All platforms · Forever
One purchase unlocks premium content across every PromptPlay game — in your browser, Claude, ChatGPT, or any MCP client. No subscription. No recurring fees. Ever.
Dead on Arrival Premium
5 exclusive mystery themes, complex evidence chains, deeper suspect AI, and extended case files with more suspects and locations.
WordForge Premium
Expert-level word lists, themed puzzle collections, exclusive crossword packs, and advanced scoring tiers.
All Future Games
Early access to Realm of Echoes and every new game we launch — premium for life.
All Platforms
Play premium content via browser, Claude Desktop, ChatGPT, or any MCP-compatible AI client.
Instant access · Secure payment via Stripe · No account required
Ready to play?
No downloads. No accounts. No installs. Just open your AI and start playing.