Download
Hero Client
The most advanced Minecraft client. Performance, and the Hero Studios ecosystem.
Hero Client downloads are per Minecraft version. Installs, launcher builds, Java
requirements and every supported Minecraft version are listed below — one JAR per release.
Open /downloads/hero-client 
Hero Client 2.2
Per-version builds ship as separate Fabric JARs — install the one matching your Minecraft version. Java 21 for 1.21.x, Java 25 for 26.x. All 17 releases supported.
| Build | File | Size | SHA-256 | Get |
|---|---|---|---|---|
| 1.21.9 | HC-2.2-1.21.9.jar | 5.06 MB | 2ee2a499b7b9… | JAR |
| 1.21.10 | HC-2.2-1.21.10.jar | 5.06 MB | 49ca230b2f93… | JAR |
| 1.21.11 | HC-2.2-1.21.11.jar | 5.06 MB | 23d0b7256288… | JAR |
Click a SHA-256 hash to copy it, then verify your download matches.
Downloads are provided under the HBBML license. Install instructions are in the documentation.
Always verify the SHA-256 checksum of downloaded files.
Version history & known issues
All versions, every note
Every release of Hero Client with its warnings and known errors. The table above lets you download any version's files.
Phase 1 — multi-version + full GUI
- Multi-version builds: all 17 Minecraft releases (1.21 through 26.3) via version matrix — Mojang mappings for 1.21.x, bundled for 26.x
- Command framework: parser with quoting/escaping, registry with namespace + trie prefix search, completion engine, middleware pipeline
- Config validators: range, enum, TTL cache, diagnostics — invalid values rejected at write time
- Performance engine: FrameTimeMonitor (240-slot ring buffer), real FPS / avg FPS / 1% low, CPU/memory dashboard
- Accessibility: 6 features wired (color-blind filter, high contrast, UI scaling, screen reader, reduced motion, keyboard nav) with settings screen
- HUD editor: drag-and-drop, snap-to-grid, grid overlay, right-click visibility toggle, JSON persistence
- Keybind editor: click-to-rebind, conflict detection, per-row reset, persistence
- Mod menu rewritten: category tabs, real-time search, feature card grid with toggles, expand for details
- Settings screen rewritten: 7 sections (General, Performance, Visuals, HUD, Keybinds, Accessibility, About)
- QoL: smooth zoom (2x/4x/8x scroll levels), animated freelook, fullbright modes, dynamic crosshair, waypoint distance colors
- Mod wired to core command framework (CoreCommandBridge); 125 features across 16 categories
- Every feature actually implemented — no dead toggles
Requires Java 21 for 1.21.x, Java 25 for 26.x
Stabilisation and launch fix
- Fixed launch crash: glGetString called before OpenGL context existed — EXCEPTION_ACCESS_VIOLATION on every launch
- Fixed mixin crash: MouseClickMixin declared CallbackInfoReturnable on a void method — entire mixin silently failed
- Wired module-ai into the Gradle reactor — 221 tests now reachable
- 3,800+ tests passing across all modules
Requires Java 21 — not 25. The mod's fabric.mod.json enforces this, but older JREs fail silently
Fixed: MemoryRenderer GL function pointer null on launch
Early development build
- Modular client with 50+ toggles
- HUD suite, keybinds, mod menu
- 16-version build matrix
Alpha — expect rough edges
Some features are gated until fully implemented
Known: mixin descriptor warnings on some 1.21.x builds (silently skipped)
Could not copy — select the hash manually.