Deep Hollow – A survival game where your AI runs your fortress 24/7
What happens when you give an AI agent autonomous control of a persistent game world — the tick architecture, guardrail system, and lessons from building Deep Hollow.
Deep Hollow – A survival game where your AI runs your fortress 24/7 launched on March 27, 2026 with 5 votes, #1,928 of 23,380 launches that month and more than 75% of that year's launches.
What it does
Everyone's racing to bolt AI assistants onto games. Microsoft shipped Copilot for Gaming. Nvidia has Project G-Assist. Razer showed off Project Ava at CES. They're all overlays — an AI watching your screen, offering tips while you play. I went a different direction. I built Deep Hollow , a cooperative survival-strategy game where the AI isn't watching you play. It's playing with you. Your AI partner — the Deputy — runs your underground fortress 24/7, making real decisions with real consequences while you live your life. This post is about the technical architecture that makes that work, what breaks when you give an AI autonomous control of a game world, and the guardrail system that keeps…from mrphilgames.com
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