It was added to Rocket League at the same time the game went free-to-play, and the Supersonic Legend rank will really set the special players apart. The relatively new Supersonic Legend rank is one of the most welcome changes to Rocket League ranked since it was introduced. For instance, upon ranking, it will display as Platinum II Division II, like the screenshot above. This may sound confusing at first, but it's easy to get the hang of. Within these tiers are four divisions which also use the roman numerals I, II, III, and IV. Within each of the ranks, excluding Supersonic Legend, there are three tiers I, II, and III. The Rocket League ranks you can achieve are: Seemingly due to its lack of popularity, this playlist headed to the archives. Now that Rocket League is free-to-play, Pysonix removed a playlist called '3v3 Solo Standard', which allowed solo players to head into a 3v3 queue without fear of coming up against teams. It's worth noting that these competitive Rocket League playlists differ from the casual playlists in-game too leaving a match early without forfeiting comes with leaving penalties, and bots won't replace any players that do abandon the match.
While there are other modes in the game - more on those in a moment - 1v1, 2v2, and 3v3 are typically what you see the pro players and content creators playing. In the Rocket League Championships, you see them playing 3v3 Standard, however you often see players such as Mariano "SquishyMuffinz" Arruda practising their freestyling skills on competitive 1v1. These modes are the three core playlists in the Rocket League ranking system because they are the foundation of Rocket League.
You have to do 10 matches per playlist, for a total of 30 games until you have three separate Rocket League ranks. The placement games will allow Rocket League to determine how good you are and then place you with players of similar abilities. When playing competitive, you will initially have to go through 10 placement games to get placed in your designated rank. For example, if you play more 3v3 Standard, you might be Diamond rank there, but because you're not as good at 1v1 matches, you're only Gold in Duel. Within each game mode, you will get a separate rank. In competitive Rocket League, which can be found by clicking Play followed by Competitive, there are three playlists:
Rocket League Ranks: What Is Competitive Play?