ClassiCube is a custom Minecraft Classic compatible client written in C from scratch.

ClassiCube aims to replicate the 2009 Minecraft Classic client while offering optional enhancements to improve gameplay. ClassiCube can run on many systems, including desktop, web, mobile, and even some consoles.

You can download ClassiCube here and the very latest builds here.

ClassiCube strives to replicate the original Minecraft Classic experience by strictly adhering to clean room reverse engineering approach.

If you're interested in documenting or verifying the behaviour of the original Minecraft Classic, please get in contact on the ClassiCube Discord

Initially, you will need to run ClassiCube.exe to download the required assets from minecraft.net and classicube.net.
Just click 'OK' to the dialog menu that appears when you start the launcher.

Note: When running from within VirtualBox, disable Mouse Integration, otherwise the in-game camera won't work properly.

Singleplayer mode Run ClassiCube.exe, then click Singleplayer at the main menu.

Multiplayer mode Run ClassiCube.exe. You can connect to LAN/locally hosted servers, and classicube.net servers if you have a ClassiCube account.

The most common reason for being stuck on OpenGL 1.1 is non-working GPU drivers - so if possible, you should try either installing or updating the drivers for your GPU.

Otherwise:

• On Windows, you can still run the OpenGL build of ClassiCube anyways.
  (You can try downloading and using the MESA software renderer from here for slightly better performance though)
• On other operating systems, you will have to compile the game yourself.
  Don't forget to add -DCC_BUILD_GL11 to the compilation command line so that the compiled game supports OpenGL 1.1.

ClassiCube runs on:

• Windows - 95 and later
• macOS - 10.5 or later (can be compiled for 10.3/10.4 though)
• Linux - needs libcurl and libopenal
• Android - 2.3 or later
• iOS - 8.0 or later
• Most web browsers (even runs on IE11)

And also runs on:

• Raspberry Pi - needs libcurl and libopenal
• FreeBSD - needs libexecinfo, curl and openal-soft packages (can download from here)
• NetBSD - needs libexecinfo, curl and openal-soft packages (can download from here)
• OpenBSD - needs libexecinfo, curl and openal packages
• Solaris - needs curl and openal packages
• Haiku - needs openal package (if you have a GitHub account, can download from here)
• BeOS - untested on actual hardware
• IRIX - needs curl and openal packages
• SerenityOS - needs SDL2
• Classic Mac OS (System 7 and later)
• Dreamcast - unfinished, but usable (can download from here)
• Saturn - unfinished, major rendering and stability issues (can download from here)
• Switch - unfinished, but usable (can download from here)
• Wii U - unfinished, major issues, broken on real hardware (can download from here)
• Wii - unfinished, but usable (can download from here)
• GameCube - unfinished, but usable (can download from here)
• Nintendo 64 - unfinished, moderate rendering issues (can download from here)
• 3DS - unfinished, but usable (can download from here)
• DS/DSi - unfinished, rendering issues (can download from here)
• PS Vita - unfinished, rendering issues (can download from here)
• PSP - unfinished, rendering issues (can download from here)
• PS3 - unfinished, rendering issues (can download from here)
• PS2 - unfinished, major rendering and stability issues (can download from here)
• PS1 - unfinished, major rendering and stability issues (can download from here)
• Xbox 360 - completely unfinished, broken on real hardware (can download from here)
• Xbox - unfinished, major rendering issues (can download from here)

Note: The instructions below automatically compile ClassiCube with the recommended defaults for the platform.
If you (not recommended) want to override the defaults (e.g. to compile OpenGL build on Windows), see here for details.

1. Open ClassiCube.sln (File -> Open -> Project/Solution)
2. Compile/Build it (Build -> Build Solution).

If you get a The Windows SDK version 5.1 was not found compilation error, see here for how to fix

1. Use 'Developer Tools for Visual Studio' from Start Menu
2. Navigate to the directory with ClassiCube's source code
3. Run cl.exe *.c /link user32.lib gdi32.lib winmm.lib dbghelp.lib shell32.lib comdlg32.lib /out:ClassiCube.exe

Assuming that you used the installer from https://sourceforge.net/projects/mingw-w64/ :

1. Install MinGW-W64
2. Use either Run Terminal from Start Menu or run mingw-w64.bat in the installation folder
3. Navigate to the directory with ClassiCube's source code
4. Run gcc -fno-math-errno *.c -o ClassiCube.exe -mwindows -lwinmm

Assuming that you used the installer from https://osdn.net/projects/mingw/ :

1. Install MinGW. You need mingw32-base-bin and msys-base-bin packages.
2. Run msys.bat in the C:\MinGW\msys\1.0 folder.
3. Navigate to the directory with ClassiCube's source code
4. Run gcc -fno-math-errno *.c -o ClassiCube.exe -mwindows -lwinmm

Setting up TCC:

1. Download and extract tcc-0.9.27-win64-bin.zip from https://bellard.org/tcc/
2. Download winapi-full-for-0.9.27.zip from https://bellard.org/tcc/
3. Copy winapi folder and _mingw_dxhelper.h from winapi-full-for-0.9.27.zip into TCC's include folder

Compiling with TCC:

1. Navigate to the directory with ClassiCube's source code
2. In ExtMath.c, change fabsf to fabs and sqrtf to sqrt
3. Run tcc.exe -o ClassiCube.exe *.c -lwinmm -lgdi32 -luser32 -lcomdlg32 -lshell32
   (Note: You may need to specify the full path to tcc.exe instead of just tcc.exe)

1. Install X11, XInput2, and OpenGL development libraries if necessary.
   For Ubuntu, these are the libx11-dev, libxi-dev and libgl1-mesa-dev packages
2. Run either:
   • make linux or
   • cc -fno-math-errno src/*.c -o ClassiCube -rdynamic -lpthread -lX11 -lXi -lGL -ldl

1. Install MinGW-w64 if necessary. (Ubuntu: gcc-mingw-w64 package)
2. Run i686-w64-mingw32-gcc -fno-math-errno src/*.c -o ClassiCube.exe -mwindows -lwinmm

1. Install MinGW-w64 if necessary. (Ubuntu: gcc-mingw-w64 package)
2. Run x86_64-w64-mingw32-gcc -fno-math-errno src/*.c -o ClassiCube.exe -mwindows -lwinmm

Although the regular linux compiliation flags will work fine, to take full advantage of the hardware:

gcc -fno-math-errno src/*.c -o ClassiCube -DCC_BUILD_RPI -rdynamic -lpthread -lX11 -lXi -lEGL -lGLESv2 -ldl

1. Install a C compiler if necessary. The easiest way of obtaining one is by installing Xcode.
2. Run either:
   • make darwin or
   • cc -fno-math-errno src/*.c src/*.m -o ClassiCube -framework Cocoa -framework OpenGL -framework IOKit -lobjc

1. Open the misc/macOS/CCMAC.xcodeproj project in Xcode
2. Compile the project

NOTE: If you are distributing a modified version, please change the package ID from com.classicube.android.client to something else - otherwise Android users won't be able to have both ClassiCube and your modified version installed at the same time on their Android device

Open android folder in Android Studio (TODO explain more detailed)

Run gradlew in android folder (TODO explain more detailed)

iOS version will have issues as it's incomplete and only tested in iOS Simulator

NOTE: If you are distributing a modified version, please change the bundle ID from com.classicube.ios.client to something else - otherwise iOS users won't be able to have both ClassiCube and your modified version installed at the same time on their iOS device

1. Open the misc/ios/CCIOS.xcodeproj project in Xcode
2. Compile the project

xcodebuild -sdk iphoneos -configuration Debug (TODO explain more detailed)

1. Install emscripten if necessary.
2. Run either:
   • make web or
   • emcc src/*.c -s ALLOW_MEMORY_GROWTH=1 -s TOTAL_STACK=1Mb --js-library interop_web.js

The generated javascript file has some issues. See here for how to fix

For details on how to integrate the webclient into a website, see here

Functions and variables in .h files are mostly documented.

Further information (e.g. style) for ClassiCube's source code can be found in the doc and misc folders.

Fixes for compilation errors when using musl or old glibc for C standard library

• Press escape (after joining a world) or pause to switch to the pause menu.

• Pause menu -> Options -> Controls lists all of the key combinations used by the client.

• Note that toggling 'vsync' to on will minimise CPU usage, while off will maximimise chunk loading speed.

• Press F to cycle view distance. Lower view distances can improve performance.

• If the server has disabled hacks, key combinations such as fly and speed will not do anything.

• To see the list of built in commands, type /client.

• To see help for a given built in command, type /client help <command name>.

ClassiCube uses sounds from Freesound.org
Full credits are listed in doc/sound-credits.md