Free Public Beta

A Minecraft 1.8 PvP client,
rewritten in Rust.

No JVM. Faster startup, lower memory. Built from scratch — not a Java mod.

Join the Discord See what works →

Windows · Linux  ·  Minecraft 1.8.9 (protocol 47)

Free Public Beta — anyone can join the Discord and download it. Many features are planned but not yet built, and there are known bugs (see below). If you're looking for a polished, feature-complete client today, come back later.
Implemented

What works today

Everything below is running right now. The list is short — we're being honest.

Online login

Microsoft account authentication via Device Code Flow. No offline-only accounts.

Multiplayer ready

Connects to any vanilla-compatible 1.8.9 server. AES/CFB8 encryption + zlib compression.

Native performance

No JVM. Rust + wgpu rendering, tokio networking. Faster boot, lower RAM than Java clients.

Single-player

Boots a local PaperSpigot 1.8.8 server in the background (Java 8 auto-downloaded if needed) and connects over localhost.

HUD editor

Drag-to-place HUD elements. Positions saved per profile.

Resource packs

Standard 1.8.9 resource packs work. Apply and manage from the in-game menu.

A few of the working mods

Combo Counter Target HUD Reach Display Damage Indicator Keystrokes Armor Status Potion Status Pearl / Gap Cooldown Sprint Indicator Custom FOV Zoom 1.7 Animations Sword Trail Scoreboard

137 mods implemented so far. Many are basic HUD widgets.

Planned

What's coming

These are on the roadmap. None of the items below work yet. We're showing them so you know where the project is heading.

Anti-cheat

  • Grim Simulation false positive
  • Strict-server PvP verification

Render

  • Player Outline
  • Enchant Glow
  • Chunk Animator
  • Custom Crosshair editor

Engine

  • Faster chunk meshing
  • Frame-pacing pass
  • Shader support

Misc

  • Standalone launcher (account/version management)
  • Replay mod
  • Friends / Party
  • Custom keybind editor
Technical angle

Why rewrite in Rust?

Most 1.8 custom clients are Java mods loaded on top of the original jar. That means a JVM, mod-loader overhead, and inherited memory footprint.

This client ships a Rust engine instead — rendering, physics, networking, protocol, all rewritten from scratch. The payoff is lower memory use and faster cold start. The cost is everything has to be reimplemented one method at a time.

Each feature that ships is native, not emulated — nothing here is emulating Forge/Fabric APIs.

Renderingwgpu
Networkingtokio
PhysicsVanilla 1.8 (translated)
Protocol47 (1.8.9)
RuntimeNative · no JVM
Transparency

Known issues

We're keeping this page honest. Here's what's broken right now.

Anti-cheat

Grim AC Simulation flag — still under investigation

On strict Grim servers, the Simulation check fires during sword block-hit cycles and occasionally during slow approach attacks near max reach. Every physics path we can identify has been audited line-by-line against vanilla 1.8.9, but the root cause is still open. Mob PvE is unaffected. If your server runs Grim with tight thresholds, expect false positives.

Scope

Single-player runs a local PaperSpigot server

Blue Client doesn't have its own integrated server or world generator — single-player works by launching a local PaperSpigot 1.8.8 server in the background (auto-downloading a bundled Java 8 runtime if needed) and connecting to it over localhost. Saves live under ~/.blue/saves/.

Incomplete

Rendering gaps

A few visuals remain placeholder or missing: water flow direction, sign text, banner patterns, piston animation. Functional but rough.

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Everything happens on Discord

Downloads, updates, support, feedback — all in one place. Join us to grab the client and follow development.

Join the Discord

discord.gg/Rv839W6XQ9