Java Edition Alpha v1.0.0

Alpha 1.0.0 was the first Alpha version of the game. It was wrongly labeled as "Minecraft Infdev" at the top left corner while playing in a world and added two types of stairs.

Two days before its official release, there was a downloadable version to test the offline client.

Additions

 * Added wooden stairs and cobblestone stairs.
 * Wooden stairs use the id (53) of the previously removed infinite lava source block.