Demo

Official Minecraft demo releases available to try for free include:
 * The PC Gamer Minecraft Demo - a limited version of Minecraft Beta 1.3. You can play on a world for up to 100 minutes.
 * Minecraft Classic - the first development version of Minecraft available in both Singleplayer and Multiplayer.
 * Minecraft 4k - a very limited version of Minecraft developed for the Java 4K in less than 4 kilobytes.
 * Minecraft snapshot 12w16a contains a demo mode for users who have not purchased the game, however as stated in the changelog, it will not be available until the next full update.