I would like a game like this. You start as a rookie, being someone else's partner and where he/she's the boss and you can only follow orders, you 'level up' as you do missions until you get to be the leader, then level up more and now you're a detective, level up more and you're the captain, where the game becomes more strategic as you now handle teams of policemen. Level up more and you get to say "I'm too old for this sh*t!" and retire.