Java Edition Alpha v1.2.0

Alpha v1.2.0, the first release of the Halloween Update, was released with server 0.2.2 on October 30, 2010, adding the Nether along with new Nether-exclusive mobs and blocks. It also added fishing, a new terrain generator, and other changes and fixes. This version is available in the launcher but when attempting to play it downloads Alpha v1.2.0_02 instead.

Additions

 * New terrain generator, featuring biomes

Blocks

 * Netherrack Revision 1.png Netherrack
 * Soul Sand.png Soul Sand
 * Glowstone Revision 1.png Glowstone
 * Carved Pumpkin.png Pumpkin
 * Jack o'Lantern.png Jack o'Lantern
 * Portals

Items

 * Watch
 * Craftable item that tells the time
 * Glowstone dust
 * Raw fish and cooked fish

Mobs

 * Ghast
 * Zombie Pigman

World generation

 * The Nether
 * A hell-like dimension that can be used for quick travel.

Gameplay

 * Fishing

General

 * New music tracks and sound effects.

Changes

 * Higher lighting values are required the deeper they are to keep mobs from spawning.
 * Stairs, crafting tables, chests, and furnaces now face the same direction as the player when placed.
 * Creepers have new sounds.
 * Grass and leaves are now darker in shade.
 * Sunrise now creates a red glow at the horizon.
 * Pressing hides the HUD and the view-model from the person's view. In third person mode, pressing  will create a view looking back at the player's own face.
 * Fake chunks generate in the Far Lands.
 * Removed Winter Mode.