Quote: "I think that solution requires you to kill the enemies in sequence?"
I did not know, but he can test it bruce
I also have another solution
;Artificial Intelligence Script
;Header
desc = Use Door (Push Open and Push Closed)
;Triggers
:state=0:dimvar=enemykilled,setvar=enemykilled 0,state=1
:state=1,varequal=enemykilled 10:state=2,setframe=0,sound=$0
:state=2:incframe=0
:state=2,frameatend=0:state=3,coloff
;End of Script
enemy destroy script
ragdoll
;Artificial Intelligence Script
;Header
desc = Leave corpse
;Triggers
:state=0:setalphafade=100,state=1,suspend,coloff,ragdoll
:state=1:addvar=enemykilled 1,state=2
;End of Script
leavescorpse
;Artificial Intelligence Script
;Header
desc = Leave corpse
;Triggers
:state=0:setalphafade=100,state=1,suspend,coloff,ragdoll
:state=1:addvar=enemykilled 1,state=2
;End of Script
fadecorpse
;Artificial Intelligence Script
;Header
desc = Fade Out Disappear
;Triggers
:state=0:state=1
:state=1,alphafadeequal=100:decalphafade=0
:state=1,alphafadeequal=0:state=2,destroy
:state=2:addvar=enemykilled 1,state=3
;End of Script
This are now three solutions

Test them all and decide