Ex-Blizzard Developer Claims AI-Coded Game Engine Backed by AMD Builds 93 Times Faster Than Unreal

By CriticalPixel · 2026-09-11

Mark Kern just told the internet that AI can replace a AAA game engine, and he has the receipts to back it up. The former Blizzard developer and World of Warcraft team lead spent the last six months tearing Unreal Engine out from under his indie shooter Em-8ER and rebuilding it with AI assistance. He says the result, a homegrown engine called Kun-Zhi, lets his small team ship features 93 times faster than they did with Unreal, and two hardware heavyweights, AMD and Razer, are now putting their names behind the project.

What Kern Actually Built

Kern posted the announcement on X on September 10, laying out a full changelog for the engine update. The list includes a new character animation system, world collision meshes, a Blender export pipeline for animation, outfit swapping for characters, physics-driven effects, fully networked client and server player capsules, and pilotable vehicles. He is careful to put vibe in quotes when he describes the process, insisting the label undersells the engineering judgment involved. Kern wrote that the coding was always the drudge part of making a game, and that the real skill now lives in data structures, architecture, and knowing how to steer an AI model toward output that actually ships instead of collapsing the moment a player pokes at it.

Character screenshot from Em-8ER showing armor and outfit design built in the Kun-Zhi engine

The AI Coding Gold Rush Hits Game Engines

Kern's bet lands in the middle of a real industry problem. Licensing Unreal Engine or building a custom engine from scratch both cost small studios money and years they usually do not have, which is why so many indie teams end up locked into Epic's royalty structure regardless of whether Unreal actually fits their game. Kern says he used a rotation of three AI coding tools, Codex, Grok, and Claude, leaning on Astra most recently, to write Kun-Zhi from the ground up in C on top of Vulkan, with some Elixir mixed in for good measure. If even a fraction of his speed claim holds up under outside testing, it points at a future where small teams stop paying a licensing tax just to get a functioning engine under their game.

AMD And Razer Are Already In

This is not a bedroom hobby project anymore. Kern confirmed that AMD and Razer are official corporate sponsors of the Kun-Zhi engine, and he is openly soliciting more sponsorship deals through direct message pitches on X. He plans to release the engine publicly, starting with the backers who already fund Em-8ER through the studio's patron program, before opening it up more broadly. A full backer pack is currently discounted 50 percent through the studio's own site, timed to ride the wave of attention the announcement is pulling in.

PC Gamer Flags The Obvious Caveat

PC Gamer covered the announcement and pointed out the catch that Kern's own post glosses over: everything shown so far is hand-picked capture from the developer's own account, not a build handed to outside testers or reviewers. Writer Jacob Fox noted the character models and physics still look rougher than anything built in Unreal or Unity, even while granting that a small team shipping networked multiplayer characters and pilotable vehicles out of a homemade AI-first engine is still an unusual milestone. Kern has not published an independent benchmark or handed the engine to a neutral third party, so the 93 times figure is currently his claim alone, not a verified result.

Community Reaction Is Split

Reaction under Kern's post is mixed rather than unanimous. Commenter Pirat_Nation called the pace of AI assisted development crazy, and Kern replied with a simple yes. Not everyone is buying the framing, though. Developer Jeff Chau, posting as SuiJeneris, pushed back on the wider wave of viral AI coding claims flooding X, arguing that prompting is cheap and that the real labor sits in the repeated cycle of generating, reviewing, and fixing output until it actually holds up inside a shipped game. Another commenter flagged one character outfit as needing a design tweak, and Kern agreed on the spot to make it optional in a future update, a small detail that shows how hands on he still is with a pipeline he is billing as AI-first.

Gameplay footage still from Em-8ER showing mech combat rendered in the AI-first Kun-Zhi engine

The CriticalPixel Take

Kern has a real resume, original World of Warcraft, Diablo 2, and the underwhelming Firefall, and that history buys him more benefit of the doubt than a random account claiming a 93 times speedup would ever get. That said, a solo developer announcing gains this dramatic off a demo reel he edited himself is not proof of anything yet. AMD backing a small AI game engine is a cheap, smart PR play for a chip company chasing every headline tied to AI right now, and it costs them almost nothing if Em-8ER never actually ships. The technology behind Kun-Zhi could be legitimate, could be overstated, or could land somewhere in between, and there is no way to know which until developers outside Kern's own studio get hands on time with the toolset.

What Happens Next

Kern says the first How To articles on AI coding and game development are dropping this week, which should give outside developers their first real look at how Kun-Zhi works instead of just a highlight reel. Public release is planned to start with backers before opening more broadly, so the actual test comes once people outside Kern's studio get their hands on the engine and try to match his numbers. Until independent developers can replicate the 93 times claim on their own projects, treat it as a pitch aimed at backers and sponsors, not a peer reviewed result.