: Users report that updating the manual jre64 folder with a newer Java 25 runtime (like Zulu or GraalVM) can drastically improve frame rates. Some players on modest hardware saw FPS jump from inconsistent 50–170 FPS to a stable 160–200 FPS .
. Specifically, it is the Zulu OpenJDK provided by Azul Systems, which replaced the Oracle JRE in later versions of the game. zulu platform x64 architecture project zomboid updated