THE LEVIATHAN PLATFORM
Your Minecraft.
One connected platform.
A modern launcher and client experience built around performance, migration, customization, support and control.
Public release downloads appear only when release and security gates are ready.
Leviathan LauncherConcept previewMinecraft Java
1.21 · Fabric · 42 mods
Migration readyBackup before import
Safe memory targetBased on system profile
WHY LEVIATHAN
Minecraft should feel simple before you press Play.
Leviathan is being built around a straightforward idea: the launcher should understand your setup, help you move it, explain failures clearly and stay out of the way when everything works.
PRODUCT FAMILY
Built together.
Useful on their own.
LEVIATHAN LAUNCHER
Launch, manage and repair.
Versions, instances, runtimes, content, diagnostics and migration in one place.Explore Launcher →LEVIATHAN CLIENT
Play your way.
Performance, customization, HUDs, social tools and a connected Leviathan experience.Explore Client →CONNECTED PLATFORM
One identity across Leviathan.
Profiles, verified ownership, community, support and future platform services.See the platform →MIGRATION
Switch launchers.
Keep your Minecraft.
Leviathan is being designed to import compatible worlds, mods, modpacks, resource packs, shaders, keybinds, HUDs, screenshots and settings with a preview before anything changes.
- 01ScanFind compatible data without moving it.
- 02ReviewSee conflicts and choose what comes across.
- 03ProtectCreate a backup before the import begins.
CURRENT LAUNCHERExisting Minecraft setup
ScannedWorlds7 detected
ReadyMods & modpacks46 compatible
ReadySettings2 conflicts
ReviewScreenshots118 files
Readyi Recommendations stay transparent and user-overridable.
SYSTEM AWARE
Good defaults for
the PC you actually own.
Instead of making everyone guess at Java versions and memory limits, Leviathan can recommend conservative settings based on the machine, Minecraft version, loader and workload.
Learn about automatic tuning →HELP THAT CONNECTS THE DOTS
An error code should be the beginning of the answer.
Stable Leviathan error codes are being designed to connect crashes, download failures, authentication, Java, graphics, networking and other problems to known issues and useful support.
Open Support Center →Authentication could not complete
Preserve the original service error, show likely causes, offer safe next steps and link the issue to support context.
CONNECTED BY DESIGN
More than a launcher.
Leviathan is growing into a connected platform, but each piece should earn its place and clearly communicate whether it is available, in development or still on the roadmap.
LEVIATHANDEVELOPMENT
Follow what changes.
See where Leviathan is heading
Public product direction, priorities and planned milestones.
View roadmap → CHANGELOGTrack public launcher changes
Follow changes as the launcher develops.
Read changelog → ISSUESReport and follow bugs
Use the public issue tracker for reproducible launcher defects.
Open issues →