Former Blizzard developer replaces Unreal Engine with AI-built custom engine, claiming 93x speedup

Sep 12, 2026 · Issue 6 · 1 source, 1 article

Mark Kern, a former Blizzard developer, used AI to replace Unreal Engine with a custom engine in the Em-8ER project. He claims the result is 93 times faster.

Who is affected and how

senior developer

The claim is self-reported and has no independent measurement, so treat it with caution, but it shows the direction of large AI-assisted rewrites.

Sources

• Esport1 - Has Unreal Engine run out of steam? Ex-WoW developer replaced the popular engine with AIesport1.hu · Sep 12, 2026 · magyar

Machine-generated summary based on the titles and excerpts of the source articles. The facts come from the linked article.