Game Boy Advance

In 2001, a Game Boy Advance version of Doom was released by David A. Palmer Productions. It has several differences from the original Doom:


 * Simplified levels based on the PlayStation Doom levels


 * No Cyberdemon or Spiderdemon


 * No E3M9, E2M9 is E3M8


 * All music has been "shifted ahead" (E1M1 uses E1M2 music, E1M2 uses E1M3 music, etc.)


 * The monster's blood is green and Doomguy's face does not bleed


 * Monster corpses vanish after a few seconds


 * Ultra-Violence mode is renamed "Nightmare", true Nightmare mode deleted altogether


 * The game can only be saved between levels


 * No animated intermissions


 * In the original Doom, the Tower of Babel appears to be "built" during episode 2--with each intermission screen, the tower becomes a little taller, growing from a foundation to a full tower. This does not happen in GBA Doom.


 * Altered ending text, episode 4 ending screen appears instead of the famous "bunny" ending (probably to avoid an M rating)


 * Demon dying sound replaced with Imp dying sound