Rhythm Heaven Megamix (Rhythm Heaven The Best Plus in Japan and Rhythm Paradise Megamix in Europe) is the 4th entry in the Rhythm Heaven series which includes 100 minigames, including 30 completely new ones.
In the game, there are, as previously stated, 100 mini games in the entirity of the game. There are 70 returning games, such as Karate Man, Munchy Monk, or Ringside, and 30 new games, including Catchy Tune, Tongue Lashing, and Tangotronic 3000. There are a variety of lands to go through, as the first 6 include 4 minigames, and the towers include 4 sequels to those games and a remix(Such as the Barbershop Tower, Citrus Tower, Honeybee Tower, and Machine Tower) or 4 minigames a remix(Lush Tower, Donut Tower, and Songbird Tower).
This is the game's multiplayer, supporting up to 4 players via download play. Each player plays on his or her own 3DS. There are three worlds to go through, based off of the Gatekeeper Trio (Saffron, Saltwater, and Paprika), each with increasing difficulty. To unlock a new world, you must clear all challenges in the world (excluding marked super hard challenges). There are three to seven pre-chosen courses in each challenge, unless you choose a Game Gamble stage. If you fail a challenge, an icon of your train begins to break in the bottom right hand corner of the top screen, and after three failures, the train explodes, and all players lose. Grading is very clear in the challenges, as there are three ways of grading. The first is trying to surpass a score that with the combined score of all players must be passed. The second being each player gets a set number of hearts, and if at least one player succeeds the challenge with at least one heart, all players pass. The third is a "Don't get eaten" challenge, where the players must work together and maintain perfect rhythm, as only perfect beats will allow you to escape from the monster. Get eaten, and all players lose. For completing a stage, you will receive one flow ball(two for Super Hard stages) in Saffron World, and two(three for Super Hard stages) in the other two worlds, for completing a stage for the first time. These can be exchanged in the shop for Rhythm games or 30 coins each, depending on if you own all of the games. Clear the same stage again, and you will be given the option of 3 treasure chests. The chests have random rewards, so choose carefully!
This is the first Rhythm Heaven with a proper plot. The story of the game is to guide Tibby (the little guy on the cover, named Tebiri in the Japan) home, with the Rhythm Games. Be warned, as there are spoilers ahead. If you do not want to have the plot given, then don't read this section. You need to travel through multiple lands to get to Lush Tower to climb to the top and send Tibby home. He falls back down on the way up, and you learn that there are 6 more towers to complete. After completing all 7 towers, Tibby is finally sent home, with his mother. A letter from Tibby then appears, saying that you need to come to Heaven World and help restore the flow. You now can enter Tibby's home land, and go through three more lands, to see that Tibby's house is his mother, and he will grow up to become a house for his offspring, being a guardian of Heaven World. After beating the Final Remix, it's discovered that the reason for the loss of Flow in Heaven World is due to Tibby's mother holding her breath to rid herself of the hiccups. We are then presented with a credit scene of how many times you have played each game.