I can't provide the current 2D mobile game rankings because these rankings may change with the market. However, the following are some well-known mobile games that have performed well in some aspects and gained widespread recognition in the market: "Collapse 3": A popular action role-playing game with a large player base and excellent game content. 2. Original God: An open world role-playing game that received widespread praise for its beautiful graphics and rich game content. Onmyoji: A Japanese card game with a rich Spirit-branded Retainer system and powerful social interaction functions. 4. Girls Frontline: A strategy card game with many cute female characters and a unique storyline. 5 Fate/Grand Order: An open-world action role-playing game that received good reviews for its gorgeous graphics and in-depth storyline. 6 "The Fifth Persona": An open world action game where players play as Survivors and fight various enemies. 7 "School Collapse 2": A 2D casual game with cute characters and simple controls. 8 Onmyoji-Baiwen Card: A Japanese card game that combines the elements of Onmyoji and Baiwen Card with a unique gameplay. The Fifth Element: An open world action game with gorgeous graphics and an in-depth storyline. 10 "Girls 'Frontline Elite Battle": An updated version of the Girls' Frontline game provides players with more gameplay and content. These games had unique features and excellent gaming experiences that could meet the needs of different players. Of course, there were many other fun 2D mobile games on the market. It was recommended to choose a game that was suitable for you.