Global.IsEnemyEntityName - the hunter and the zombine also dosen't exsist in gmod by default yet there listed and secondly npc_poison_headcrab are diffrent from npc_headcrab_poison the diffrence is that one has code that allows them to be thrown by npc_poisonzombie

Global.IsEnemyEntityName - Minor Change

Global.IsEnemyEntityName - Minor Change + Minor Change + Minor Change