The game "The King of Fighters ARENA" operates as a gacha game, employing inherent gachapon mechanics to acquire fighter cartridges. Although all fighters are accessible for free in all game modes, players must summon each fighter's cartridge. These cartridges are attainable through the "Summon" system, with fixed base rates assigned to each fighter. Players gain access to this system upon completing the tutorial. In contrast to other gacha games with variable rates for different character rarities, The King of Fighters ARENA maintains fixed rates.