good idea! the HKs and BHs actually do have green acid for blood in doom, but the Caco's had clearly blue blood. why blue? because its electrical! they actually *spit* blasts of ball-lightning! the Pain Elementals probably have yellow blood, but noone will ever know, as they explode into multiple lost souls when they die. speaking of which, has anyone seen a pain elemental leave a corpse? if so, that should be fixed. noone else has blood that isnt red. oh, and note: the former humans, in the doom 2 manual it cal;s the chaingun guy a former commando! oops..... then again, at the end of doom 2 after you kill the boss, during the enemies sequence, it calls him the "heavy weapon dude"! cool name! Id must have missed that one. and it must have missed the sergeant, called at the end "Shotgun Guy"......