These are the arguments I used to run Minecraft on Legacy Launcher (a.k.a. the original TLauncher, which unfortunately had its name stolen and got DMCA'd by Mojang): -XX:+UnlockExperimentalVMOptions ...

Over the years, the technical and modding side of the Minecraft community has managed to achieve many impressive features ...

Generally, this is what you want to know: - Minecraft 1.17 and newer: Java 21 - Minecraft 1.16.5 and older: Java 8 Note: some modded Minecraft versions require a different Java runtime than normal (e.