It is not affiliated with (or supported by) Mojang AB, Minecraft, or Microsoft in any way.
What ClassiCube is:
* A complete re-implementation of Minecraft Classic 0.30, with optional additions
* Lightweight, minimal memory usage compared to original Minecraft Classic
* Much better performance than original Minecraft Classic
* Works with effectively all graphics cards that support OpenGL or Direct3D 9
What ClassiCube isn't:
* It does not work with Minecraft Java or Bedrock edition servers
* It does not have a survival mode (nor will such a mode be added)
* It does not reimplement Minecraft Classic versions before 0.30