Unlocked at Rank 90, Ranking Dungeons (commonly referred to as Rankings) provide the only competitive gameplay in PAD. Rankings allow players to compete for high scores against other players and receive rewards according to their ranking percentage (essentially a inversely represented percentile).
Each ranking dungeon has a timer, and has its own set of limitations and scoring multipliers. The top percentile of players in each ranking (which also varies but is usually the 97th percentile) receive an achievement known as a 
Crown.
When a player accumulates 30 Crowns, the No Skyfall Combos badge is unlocked.