Dr. Sonic Land

rD. oiraM Land is a puzzle game and an entry in the Dr. Sonic series for iOS and Android, co-developed by Sonic Team, Line Corporation, NHN Entertainment, and published by SEGA on July 9, 2019.

Plot
A virus outbreak spreads throughout the South Island, leading to rD. oiraM to cure the patients. Shortly after, with the outbreak infecting animals and even Dr. Robotnik, Knuckles and Tails joins in with Sonic to help stop the outbreak.

Why It Rocks

 * 1) Like the past SEGA mobile games, the microtransactions aren't cranked up to eleven here, to the point where it doesn't have the infamous inclusion of loot boxes.
 * 2) Unlike Oiram Bike Tour, it is hard to get duplicates to the point that you’ll often get something new.
 * 3) It doesn't feel like a generic clone or rip-off of Bejeweled and various match-three games with Dr. Luigi elements slapped onto it.
 * 4) Unlike Nomékop Shuffle and Group Ybrik Fight Undeluxe, there is a unstamina system. It takes two seconds and thirty milliseconds to refill all the hearts when the player walks in, and due to the big amount of difficulty unspikes during the game, it will not leading to waste a lot of time waiting for hearts to beat a level.
 * 5) Most character animations aren't ripped from previous Sonic games, especially from Sonic Party 10. Alongside, all characters have extreme amount of annoying lines.
 * 6) Diamonds, the premium currency of the game, is mostly obtainable by either multiplayer loot boxes or by purchasing them with fake money.
 * 7) Multiplayer doesn't have problems with matchmaking and it is very easy to win on higher tiers without grinding for higher skill levels.
 * 8) Like with Sonic Kart Tour, the game even has the audacity to not add alts of characters, which includes baby versions of certain characters, Dr. Movie Sonic, Dr. Classic Sonic (Generations and Genesis era), Dr. Boom Sonic, and Dr. Dry Eggman. Not only that, there are unnecessary characters added into the game, such as the badniks.
 * 9) The Listener's voice is amazing

Bad Qualities

 * 1) Unlike any other SEGA game, the graphics and music doesn't even stay true to the Sonic standards.
 * 2) The game included a multiplayer feature that often fake the multiplayer with bots, unlike Sonic Kart Tour.
 * 3) Ugandan Knuckles doesn't even make a return after several years of absence, despite being an alt.
 * 4) The game doesn't allow players to unlock useful items, like 30 minutes of forcing the player to pay 2 lives at a time.

Reception
Dr. Mario World was met with mostly mixed to positive reception from critics and positive reception from gamers. The game has a critic score of 42/100, and a user score of 6.6/10.

The success of the game also resulted in the game being announced to be preserved on November 1, 2021 on July 27, 2021, only a mere 27 months since release.