Phantom Labs

Co-Op Phantom SDK helps game developers add AI squadmates to their co-op games, addressing the “dead lobby” problem: players cannot enjoy a multiplayer experience when no teammates are available. Developers register their game’s objects, rules, and available abilities in Phantom Studio, then download a project-specific Roblox SDK with generated integration templates. They connect these templates to their existing game mechanics. Powered by Meta Muse Spark, Phantom interprets player instructions, reads structured game state, and selects actions through registered tools. A local controller handles movement, while game-owned functions validate and execute interactions. Execution feedback informs subsequent decisions, allowing the agent to carry out multi-step tasks. Our prototype demonstrates this workflow in Roblox: an AI companion can repair a generator, unlock a door, and follow the player toward evacuation from a single instruction. The dashboard exposes model decisions and execution results. The current MVP uses text instructions and game-state telemetry, with no fine-tuning required. Our goal is to reduce the work needed to build responsive companions while keeping developers in control of their game’s mechanics.