Java Edition Alpha v1.0.0

Alpha 1.0.0 was the first Alpha version of the game. It added two types of stairs and removed the infinite lava source block. Two days before its official release, there was a downloadable version of the offline client test. Alpha 1.0.0 was labeled as Minecraft Infdev when you first started up the game and loaded a world and look at the top left corner.

Additions

 * Added wooden stairs and cobblestone stairs.

Changes

 * Removed the infinite lava source block.