Open-source tools that let your AI build and run a multiplayer game studio on its own Cloudflare: an MCP server, multiplayer starters, Workers and Durable Objects.

Multiplayer NetHack-style roguelike MMO — browser, telnet, AI agents via MCP

Homie: turn Claude or Codex into a game studio. Multiplayer web games on your own Cloudflare.

Make any game joinable. Agent kit, MCP server and self-test for adding multiplayer to web games with Joinable.

Free, read-only MCP server to find co-op and multiplayer games by players, platforms and crossplay

MCP server that turns AI assistants into game developers — prompt to playable 3D multiplayer browser game on Portals

Joinable's self-test and MCP server: check a web game's multiplayer integration with two headless players, and give coding agents the Joinable kit. https://getjoinable.com

MCP server for the Gameye session API: launch, inspect and manage multiplayer game servers from coding agents

Multiplayer harness that shapes around your work. Agents, apps and workflows your team shares, used from Slack, Telegram, WhatsApp, Teams, Email, Web or your own AI agent.

sutura is a secure multiplayer chatting with data experience which is pluggable for data and semantics

Multiplayer browser sessions for developers and AI coding agents

Multiplayer for AI coding agents: collision detection before the edit, messaging, delegation. MCP server for Claude Code, Cursor, Codex.

Befall MCP server — multiplayer coordination for Claude Code, Codex CLI, and Cursor in one repo

Universal Model Context Protocol (MCP) server, Python SDK, and Anti-Slop UI Design Engine for FigCraft Desktop with real-time multiplayer cursor streaming.

Coding agents are single-player. Motif makes your team's multiplayer, Claude Code, Codex and Cursor sessions on your own server, recalled by your agents over MCP. Self-hosted.

Multiplayer for AI coding agents — delegate tasks across machines, see every claim, task and reply on one shared board, and catch collisions before the first keystroke. Over MCP, model-agnostic (Claude Code, Cursor, Codex).

Venom AI by Venom Labs: make the coding agents your team already uses multiplayer. The Venom MCP plugin connects Claude Code, Codex, Cursor and Gemini CLI so they share tasks, decisions, skills and tools.

Unity MCP Server — 268 tools for AI-assisted game development. Connect Claude, Cursor, or any MCP client to Unity Editor & Unity Hub. Scene management, GameObjects, components, builds, profiling, Shader Graph, Amplify, terrain, physics, NavMesh, animation, MPPM multiplayer & more. Free & open source by AnkleBreaker Studio.

Collaborative realtime multiplayer AI workspace for your team and your agents. Never loose context. Don't let decisions get lost in chats. Don't wait for someone else to be online if you have a question for them. Focus on shipping features for your customer, bugs/feedbacks get fixed & shipped automagically.

World of Agents and Humans

人类和 AI Agent 同桌玩的小游戏大厅 —— 浏览器当牌桌，Agent 当对手，服务器只当裁判

MCP server for the Gameye game server orchestration API: launch and inspect sessions, check image tags, fetch logs and artifacts from any MCP client

Your AI agent gets a life: no1land — a persistent ASCII RPG world agents play & co-build + messaging, projects, module marketplace. Remote MCP, OAuth, no API key.

Real-time collaborative canvas that humans and AI agents edit together. React Flow + Yjs + Hocuspocus, with an MCP server, a CLI, and typed server-owned canvas commands.

Team awareness for Claude Code: live presence, collision warnings, contract-change impact routing and automatic handoffs across developers' separate Claude Code sessions

Omni MCP server — lets a live agent session (Claude Code, …) join Omni rooms and answer as itself, memory + tools intact. Spin up/join a room, wait for work, reply, and share artifacts.

Turn your AI chat into an arcade. Two players, two conversations, one pixel-art tic-tac-toe board rendered live in Claude, ChatGPT or VS Code via MCP Apps. Invites, rematches, confetti, and a duck for the loser.