ClassiCube is a free multiplayer sandbox block game inspired by other games in the genre. Players can start playing directly in a web browser or download versions for supported platforms, including 64-bit Linux. The site also provides access to the game’s forums, downloads, news, and community resources.

ClassiCube supports online play and skin customization. Players can upload a skin through their account panel or use SkinSwatch, an editor for combining layers from premade skins and saving or applying a customized design. The website also offers skin-related tools for developers, including an image path for retrieving a user’s avatar.

The project is open to community participation. Its GitHub repository includes the client’s source code and issues for contributors, while players can help by testing the game, launcher, or site and reporting bugs. Related offerings include MCGalaxy server software, an Android version described as an early alpha, and optional Steam and itch.io releases. Steam purchases and Patreon support help fund the game, but paid versions are not required to play.