Dr. Mario 64 is a tile-matching action puzzle video game developed and published by Nintendo for the Nintendo 64. The game was released in North America on April 8, 2001. The game is an enhanced remake of Dr. Mario, which was originally released for the NES and Game Boy consoles in 1990, and is based around characters from the 2000 Game Boy Color game Wario Land 3. The game's soundtrack was composed by Seiichi Tokunaga, featuring arrangements of classic Dr. Mario tunes and new compositions. The game received a Japanese release as part of the Nintendo Puzzle Collection compilation, released for the GameCube in 2003. The game was re-released on the Nintendo Switch Online + Expansion Pack in October 2021, marking its first release in PAL territories. Gameplay Like its predecessor, Dr. Mario 64 is a falling block tile-matching video game. The playing field is represented on-screen as a medicine bottle populated with viruses of three colors: red, blue, and yellow. The main objective of the game to clear the playing field of all the viruses using two-colored medical capsules dropped into the bottle. The player manipulates the capsules as they fall, moving them left or right and rotating such that they are positioned alongside the viruses and any existing capsules. When four or more capsule halves or viruses of the same colour are aligned in horizontal or vertical configurations, they are removed from play. The player receives a game over if the playing field fills up with capsules such that they obstruct the bottle's narrow neck. Points are awarded when viruses are destroyed. There are several single-player modes present in the game: Classic - This mode features a similar set-up and design to the original Dr. Mario game. Story - In this mode, the player may take control of either Dr. Mario or Wario to track down the stolen Megavitamins, battling computer players on the way. Vs. Computer - In this mode, the player may battle against the computer as any character the player has played as or fought against. Flash - In this mode, the player must eliminate three particular flashing viruses faster than the computer can. Marathon - This mode consists of a never-ending rising field of viruses which does not end until the player quits or loses. Score Attack - In this mode, the player is given three minutes to clear all of the viruses as