Kingpin is definitely a game that stands out. It stands out for novel approaches (sidekicks and NPC interactions, especially, although it was not the first FPS to incorporate those, or exaggerated "realistic" violence and profanity). It also stands out for a chore of problems, especially with sidekicks/NPCs. It's quite a pin to micromanage them to let you go where you want to go and do things you want [them] to do. Nevertheless, it's an experience commited FPS players would not want to miss. It's raw, it's unfair, it's annoying every 15 minutes over, but it's still a thing you'll want to have played. Life's a bitch ;P