I was gonna say it couldn't be Hunt Showdown, but it actually fits pretty well, minus the friendly NPC. Start game, collect clues, fight the boss, wait for the banish and try to defend, then take the boss token to the extract, all while trying not to die from enemy players. Of course the enemy players make it exciting, and I guess that's why I'm not that into single player games.

How else can you create a good player experience while not alienating casual players though?