ClassiCube

WIN

ClassiCube: a Minecraft Classic-compatible client written from scratch in C (formerly ClassicalSharp, in C#). It aims to replicate the 2009 Minecraft Classic client through a “clean room” reverse-engineering approach, with optional enhancements such as custom blocks, models, and environment colors. It doesn’t try to replicate current Minecraft: it will never support survival, Minecraft accounts, or modern servers. It has a singleplayer mode and multiplayer on a LAN and on the classicube.net servers (with an account on the site), and it uses far less memory than the original. It runs on Windows (95 and later), macOS, Linux, Android, iOS, and web browsers, plus several BSDs, Haiku, IRIX, and other systems; there are unfinished versions for several consoles. On first launch the launcher downloads the assets it needs from minecraft.net and classicube.net. The latest version, 1.3.9, is from October 22, 2026, and builds are downloaded from classicube.net. The project isn’t affiliated with Mojang, Minecraft, or Microsoft.

You needNo copy of the game is needed: the launcher downloads the required assets from minecraft.net and classicube.net by itself the first time. Windows, macOS, Linux, or another supported system, with a graphics card that supports OpenGL or Direct3D 9; Linux and the BSDs need OpenAL.

How it gets to PC

Fan reimplementation

Console

Microsoft Windows

Original studio

Mojang

Year

2009

Author

ClassiCube

Stars

2.1k

Last activity

2026-11-11 · today

Latest version

1.3.9 · 2026-10-22

Language

C

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