Capcom vs. SNK2: Mark of the Millennium 2001 is a 2D fighting game that features a unique gameplay system that combines elements from both the Capcom and SNK fighting game universes. Players can select a ratio, which determines the number of characters they can use in battle, and can switch between their characters at any time during the match. The objective of the game is to defeat your opponent by reducing their health bar to zero while protecting your own. Players can perform basic attacks using light, medium, and heavy buttons, and can execute special moves and combos by inputting specific button combinations. The game also features various game mechanics, such as a guard meter, which depletes when the player blocks too much, and a groggy state, where characters become temporarily stunned and vulnerable to attack. With its diverse roster of characters, fast-paced action, and deep gameplay, Capcom vs. SNK2: Mark of the Millennium 2001 provides an exciting and intense gaming experience for players of all skill levels.