Java Edition Alpha v1.2.0 (preview)

Alpha v1.2.0-preview was a special pre-release version of Alpha v1.2.0 that was specially given to PC Gamer and Indiegames as a preview version.

Differences from Alpha v1.2.0

 * The Nether
 * Referred to as the Slip
 * Zombie Pigman
 * Has the original blood texture, instead of the slime/decay.
 * Glowstone
 * Drops itself instead of a glowstone dust.

Trivia

 * On the same day of the release of the preview, Minecraft hit 500,000 sales.