On every ranks up, you get promoted to a higher rank, and you get to share a bag of Potato Chips with your teammates.

In return the teammate can choose to return the favor by sending you a "Lucky Card".

Level 1 – Officer...
Level 5 – Deputy*
Level 12 – Detective*
Level 20 – Corporal*
Level 32 – Sergeant*
Level 45 – Lieutenant*
Level 60 – Captain*
Level 75 – Major*
Level 100 – Inspector*
Level 125 – Lead Inspector*
Level 150 – Commander*
Level 175 – Deputy Chief*
Level 200 – Commissioner*
Level 250 – Sheriff*
Level 300 – Ranger*
Level 350 – Marshal*
Level 400 – Senior Trooper *