Make AI Npcs continuously pursue the player (Singleplayer)

[Neccronixis]

Hey guys, I am looking for a way to make the AI (npcs that I spawn) chase the player no matter where they are located on the map and even if they can't see the player. For example on the map gm_bigcity, I can place a continuously spawning group of npcs using the 'NPC Groups' addon, but I want the ai to find me on the map and always know where I am so that they always come after me. What happens with the 'NPC Groups' addon is that if you kill an npc that has strayed far away from the spawn location, another replacement npc will spawn in and take the place of the dead npc, but will just stand there at the original spawn location and do nothing because it cannot 'see' the player and does not know where they are.

So basically what I'm asking, is there a way to make the AI find and chase the player no matter where they are on the map - even if the Ai can't see the player when they spawn in?