ClassicalSharp is a custom Minecraft Classic client written in C# that works on both Windows and Linux. It is not affiliated with (or supported by) Mojang AB, Minecraft, or Microsoft in any way.

You can get the latest binaries here.

What ClassicalSharp is

• Works with both minecraft.net and classicube.net accounts.
• Lightweight, minimal memory usage compared to the standard client.
• Works with effectively all graphics cards that support OpenGL.
• Provides single-player support. (only flatgrass generator, but can load .dat and .fcm maps)

It does not:

• Work with 'modern/premium' Minecraft servers.

Requirements

• Windows: .NET framework 2.0 or Mono. (Vista and later have .NET framework 2.0 built in)
• Linux: Mono.
• Mac OS X: Mono. (Not tested at all yet - likely just crashes)

Mono specific notes

You must use either build using Mono compiler or define __MonoCS__ when building, otherwise you will get runtime errors when decompressing the map using Mono. Also, if you are using an older mono version, you may need to run mozroots --import --sync to import trusted root certificates, otherwise you will get an 'Error writing headers' exception.

Instructions

The simple way to use ClassicalSharp is to use the launcher application. You can connect to LAN/locally hosted servers, minecraft.net servers, and classicube.net servers through the launcher.

Note that the first time you run the launcher, a dialog box will pop up saying: "Some required resources weren't found. Would you like to download them now?" Just click OK. (This is necessary because I cannot legally redistribute the assets of Minecraft Classic with the application)

Alternatively, you can pass command line arguments to run in multiplayer directly to the client. These are expected to be in the form: <username> <mppass> <ip> <port> <skin server>, where skin server is optional.

Key combinations

• Press escape (after joining a world) to switch to the pause menu.
• The pause menu lists all of the key combinations used by the client. These key combinations can be reassigned by clicking on a key combination.
• Press escape or click "Back to game" to return to the game.

Some points to note:

• If the server has disabled hacks, key combinations such as fly and speed will not do anything.
• Press F6 to change view distance. A smaller number of visible chunks can improve performance.
• Press F7 to toggle VSync on or off. (on minimises CPU usage)

Client commands

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