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Six months to swap Unreal out from under Em-8ER

Grummz spent six months using AI to replace Unreal Engine under his game Em-8ER with Kun-Zhi, an engine built AI-first — and says the team now develops 93× faster.

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Most "AI in games" means an assistant bolted onto an engine that was never designed for it. Grummz went the other way: six months spent replacing Unreal underneath a game that already existed, with an engine built AI-first from day one. It is called Kun-Zhi, and he says it will be released to the public, backers first.

The headline number is 93× faster. Treat that as his claim rather than a benchmark — the post gives no methodology — but the reasoning is the interesting part: the speedup comes from an engine shaped around the model instead of one that fights it.

He is blunt that this is "not a toy one-shotted overnight." The update list — character animation, collision meshes, outfit swapping, networked players, pilotable vehicles — reads like a production engine's changelog, which is exactly the point he is making.

Six months to swap Unreal out from under Em-8ER
This game is entirely "vibe" coded. I spent 6 months using AI to replace Unreal Engine from under our game Em-8ER. Now we're developing 93x faster than we ever did before with Unreal. Because our engine is developed to be 100% AI first instead of tacked on. It is not a toy https://t.co/SCIBlza1qv

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