Re: Jimonion's Final

16
I can't remember the name but there's a sort of NPC camera entity that 'sees' the player and relays that to any other NPCs in its squad. You can use it to keep the NPCs cognizant of where the player is at all times during an arena battle.
You're thinking of npc_enemyfinder. A super useful entity for encouraging NPCs to confront the player without outright scripting them to do so.
Latest Work: Forest Train, Cannon Beach