The game is celebrated for its extensive character selection, fluid animation, and engaging fighting mechanics.

Like the previous games in the series, the Power Gauge is filled as the player attacks the opponent or performs Special Moves during a battle.

A single Power Gauge stock can be used to either perform a Counterattack and Evasion technique while guarding an opponent's attack, use a Super Special Move, or initiate the MAX Activation state.

During MAX Activation, the player's offensive and defensive strength is increased for a short period and can cancel any attack into another.

However, not all the characters from the previous games are featured, and series' regulars such as King and Shingo Yabuki are absent from the Neo Geo version for the first time since their first appearance.

Instead, a new character called Nameless (ネームレス) was designed to take his place in the game and features most of K9999's special techniques with altered effects.

In November 2020, the Steam version of the game was updated with rollback netcode, allowing for higher quality online play.

[6] Critical reception to the game was positive due to its large number of playable characters, although mixed opinions were given to its aging graphics.