Doom v0.5

Doom 0.5 was an alpha version of Doom, released on May 22, 1993 to testers. This version included a number of features in addition to those found in the Doom 0.4 alpha version:


 * Collision detection between objects. It is possible to walk into monsters and pick up items.
 * It is possible to shoot monsters. There is still no animation at this stage, however; when monsters are shot, they simply vanish.
 * A working status bar and the ability to change the screen size.
 * A working menu.
 * Animated floors and working doors.
 * an Automap.
 * Skill levels. The easiest is "I just want to kill", rather than the release version's "I'm too young to die".

After the player quits the game, the "farewell" screen states that it is a preview of Doom: Evil Unleashed.

Levels
Version 0.5 included several levels, most of which were modified and used in the release version of Doom. Level 6 was held back for Doom II. Unlike the previous alpha versions of Doom, the player could transition between levels:


 * Level 1: not used in the final game
 * Level 2: E2M2
 * Level 3: E2M3
 * Level 4: E1M7
 * Level 5: E3M3
 * Level 6: MAP10
 * Level 7: E1M4
 * Level 8: E1M2
 * Level 9: E1M6
 * Level 10: E1M3
 * Level 11: E2M7
 * Level 12: E1M8
 * Level 13: E2M4