"Shadow Prisoner" is a 2D fighting game with simple controls that allow you to perform exhilarating combos. You can play with 25 characters (9 will be added for free, and one is a collaboration character that will be paid DLC). Even if you have no experience with fighting games, you can use the simple mode to play like an experienced fighting gamer just by repeatedly pressing buttons. There are story mode and survival mode for single player, and versus mode and network mode for competitive play. Network mode has a zero-latency netcode that supports rollback. If you are playing in Japan, you can play with the same input sensation as if you were playing next to someone in Japan. Currently available is the main game and the additional non-combo game April Liars. In addition, Epsilon mode, a fighting action game where you shoot each other with a barrage of bullets, exclusive to the Steam version, will be added.