add an item with the skull model and put the mappers name on it then hide it somewhere
-someone types 666 wait 2 seconds and the devil comes and flies off with their unit
-kill an npc and they spawn as a ghost and try to kill you
-if someone stays at one window for more then 2 minuets have a zombie say "srsly wil u fu@#ing lev?"
-have a sleeping zombie thats sleeptalking about the other easter eggs ex: "zzzzZZZZZ fred really gets pissy when people stay near his windows zzzzZZZZ" "zzzZZZ I wonder what that skull was doing under that desk it wasnt human zzzzZZZZ'
-a bone that if you throw it all zombies (and dogs) chaise after it until it stops moving then go after you again hidden in a doghouse
-a rat that if you kill it it drops a consumable item called meat with the description "looks a little green" that if you eat it it makes your character a super zombie and you change teams (become one of the zombies)
-have a dead body and create a puzzle to find out how he died(markings on the wall, tape recorders, etc like shaggy doo in the borderlands zombie island dlc
Shoulda said the opposite too: When 75% of people playing are alive then someone types "We won" make it an instant lose