Killcount
Killcount is a unique system in the God Wars Dungeon that restricts entry to the boss chambers. 40 followers of a god must be slain to enter the respective boss chamber. The only exception is the Ancient Prison, in which you could opt to wear full Ancient ceremonial robes to go straight to the banking area that leads to the lair of Nex, the Zarosian general. You could still choose to do it by killcount. The killcount for that god would be reduced by 40 when entering the god's boss chamber. The rest is saved and could be used for a second entry. However, leaving the dungeon completely would cause all killcount to reset to zero. The generals and their bodyguards do count towards killcount. Killcount of the four gods involved in the God Wars Dungeon is displayed at the top right corner of the screen.
The weakest Saradomin followers that could be killed for killcount are Knights of Saradomin. Saradomin priests, Saradominist Spiritual warriors, Spiritual rangers and Spiritual mages could also be killed for the purpose. Killing 40 of these grants access to Commander Zilyana and her bodyguards, Starlight, Growler and Bree.
The weakest Zamorak followers that could be killed for killcount are imps. Bloodvelds, vampires, hellhounds, werewolves, pyrefiends, icefiends, goraks, Zamorakian Spiritual warriors, Spiritual rangers and Spiritual mages could also be killed for the purpose. Killing 40 of these grants access to K'ril Tsutsaroth and his bodyguards, Tstanon Karlak, Balfrug Kreeyath and Zakl'n Gritch.
The weakest Bandos followers that could be killed for killcount are Goblins, specifically the level 12 variety. Ogres, jogres, hobgoblins orks, cyclops, Bandosian Spiritual warriors, Spiritual rangers and Spiritual mages could also be killed for the purpose. Killing 40 of these grants access to General Graardor and his bodyguards, Sergeant Strongstack, Sergeant Steelwill and Sergeant Grimspike.
The weakest Armadyl followers that could be killed for killcount are Aviansies, specifically the level 69 variety. Armadylian Spiritual warriors, Spiritual rangers and Spiritual mages could also be killed for the purpose. Killing 40 of these grants access to Kree'arra and his bodyguards, Flight Kilisa, Wingman Skree and Flockleader Geerin.
The weakest Zaros followers that could be killed for killcount are Blood reavers. Ancient warriors, ancient rangers and ancient mages could also be killed for the purpose. Killing 40 of these grants access to Nex and her bodyguards, Fumus, Umbra, Cruor and Glacies.
Barrows
Killcount is also used in the Barrows crypts. Killing any of the monsters in there (save the final brother) will add one killcount. The weakest monster to kill are level 43 crypt rats, with the strongest being the level 79 giant crypt spiders.