No JVM. Faster startup, lower memory. Built from scratch — not a Java mod.
Windows · macOS · Linux · Minecraft 1.8.9 (protocol 47) · Multiplayer only
Everything below is running right now. The list is short — we're being honest.
Microsoft account authentication via Device Code Flow. No offline-only accounts.
Connects to any vanilla-compatible 1.8.9 server. AES/CFB8 encryption + zlib compression.
No JVM. Rust + wgpu rendering, tokio networking. Faster boot, lower RAM than Java clients.
Tauri-based cross-platform launcher. Account management and version selection.
Drag-to-place HUD elements. Positions saved per profile.
Standard 1.8.9 resource packs work. Apply and manage from the in-game menu.
~120 of ~150 planned mods. Many are basic HUD widgets.
These are on the roadmap. None of the items below work yet. We're showing them so you know where the project is heading.
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.
That's why the beta is closed. Each feature that ships is native, not emulated.
We're keeping this page honest. Here's what's broken right now.
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.
No world generation, no integrated server, no save files. The client is aimed at servers — single-player support is a possible future direction, not a near-term goal.
A few visuals remain placeholder or missing: water flow direction, sign text, banner patterns, piston animation, a handful of entity models. Functional but rough.
Beta invites, builds, updates, support, feedback — all in one place. Join us to request access and follow development.
Join the Discorddiscord.gg/uE3G4r2VE8