Java Edition Alpha v1.2.0

Alpha v1.2.0, the first release of the Halloween Update, is the first version of Alpha v1.2. It was released 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
 * Spawns in the nether.
 * Carved Pumpkin.png Pumpkin
 * Jack o'Lantern.png Jack o'Lantern
 * Portals

Items

 * Watch
 * Is craftable.
 * Glowstone dust
 * Raw fish and cooked fish

Mobs

 * Ghast
 * Zombie Pigman

World generation

 * The Nether
 * A "Hell"-like world 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.

Fixes

 * 4 bugs fixed
 * Fixed bugs in multiplayer:
 * Redstone performance updated
 * Door animation fixes
 * Several performance bugs fixed
 * Rails no longer cause a crash