AI Agents Build AAA FPS Game in ThreeJS
Details multi-agent prompt with sub-agents and blind critics for high-fidelity results.
TLDR
Investor Matt Shumer posted on X about a prompting approach called the Gauntlet Loop. It directs an AI to break goals into parts, assign specialist builder and ruthless blind critic sub-agents to each, and iterate until the output exceeds real-world equivalents such as recent Call of Duty titles. Variants using Opus 5 agents have been applied to generate a first-person shooter in ThreeJS. Shumer states the sub-agent critic method is the core value and plans to demonstrate its use beyond games for nearly any project.
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MS 
Matt Shumer@mattshumer_We need a name for this prompt approach… anyone have good ideas? https://twitter.com/mattshumer_/status/2081100592689324502
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MS Matt Shumer@mattshumer_I’m officially calling this the Gauntlet Loop. The agent (not you!!) breaks the goal into parts, gives each part a specialist builder and a ruthless blind critic sub-agent, with a mandate to only pass if the generated artifact is better than some real-world equivalent.…
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SC Siqi Chen@bladeri've been independently using a very similar loop over the past few weeks for frontend design / development work - using gpt-image-2 to generate a concept art northstar can confirm that this "gauntlet loop" is extremely effective and lets you get so much more out of any model…
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JE justin Economicus@logicwinsI tried to one shot something using by having a prompt written and then executing the prompt - does not work anywhere near as good as your gauntlet loop. It works so well, now i have to dive into the linguistics and try and understand how and why it works so well. Thank you for…
HA haithum@darkzOGx@mattshumer_ This is such a mediocre prompt. After seeing the output, I’m tempted to actually drop a decent prompt to see what the model is truly capable of
HR Hi-Tech Red-Nech@rednech_ai@mattshumer_ You've been taking about this promt for 3 days now, it's really utterly not impressive, my 12 year old could have written it.