Doom v0.2

Doom 0.2 was the first publicly released alpha of Doom. It included only one small level with no changes in elevation, doors, or items. It included three enemies--the imp, the demon, and the baron of hell--which only walked in place. The weapons did nothing to them. As for textures, there was only one wall, one ceiling, and one floor texture for the whole level, though each could be changed individually by cycling through 0-9. Notably, the heads-up display in this alpha was larger and more complex than were those to follow.