PrismLauncher (An Open Source Minecraft launcher) An Open Source Minecraft launcher with the ability to manage multiple instances, accounts and mods. Focused on user freedom and free redistributability. A Microsoft or Mojang account that owns Minecraft is required to download and play the game through PrismLauncher. Other versions of Java may work, though it is recommended to compile PrismLauncher with OpenJDK17. Your JAVA_HOME environment variable determines which version of Java will be used.