Play The King of Fighters '99: Millennium Battle Online

Summary

The King of Fighters '99: Millennium Battle (often just called KOF '99) shakes up the classic three‑on‑three formula by giving each of the seven teams a fourth member that acts as a Striker. You pick three fighters for the bout, then call in the Striker with a limited number of Strike Bombs to unleash a special attack that can turn the tide. The addition of Counter Mode and Armor Mode adds strategic depth: Counter Mode boosts offense and lets you spam Super Specials, while Armor Mode hardens your defense at the cost of those supers.

The arcade cabinet runs on a Motorola 68000 CPU at 12 MHz with 64 KB of RAM, while sound is handled by a Zilog Z80 at 6 MHz paired with a Yamaha YM2610 FM synth. Graphics are rendered at 304×224 resolution with a 4,096‑color palette and 68 KB of video RAM, and the game uses Neo Geo’s built‑in copy‑protection system.

Producer Takashi Nishiyama’s last KOF project, the title features Shinkiro’s iconic artwork and a story shift to the NESTS Chronicles, introducing the mysterious fighter K'. Hiroyuki Kono explained that the Striker system was meant to spark fresh combo ideas and keep the series accessible to newcomers. Critics praised the revamped fighting system and the extra high‑score battle that pits you against Kyo Kusanagi or Iori Yagami after the final boss.

Storyline

Two years after the 1997 KOF climax, Kyo and Iori vanished after defeating Orochi. New secret invitations appear, launching a hidden tournament unlike the public events of ’96 and ’97. The host remains unknown, and every team now fields an extra fighter.

The game introduces K' as the fresh protagonist, partnered with Maxima. Together they join Benimaru Nikaido and Shingo Yabuki to form the Hero Team. Takuma Sakazaki returns as the fourth member of the Art of Fighting squad, while Mai Shiranui finally becomes an official member of the Fatal Fury team.

A new Female Fighters Team gathers King, Kasumi Todoh, Blue Mary and debutant Li Xiangfei. Returning squads receive additions: Whip joins the Ikari Warriors, Bao the Psycho Soldier team, and Jhun Hoon the Korea Justice crew. Team Edit also offers Kyo‑1 and Kyo‑2, clone versions of Kyo based on his past incarnations, while the real Kyo and Iori appear only as secret characters.

The antagonist is Krizalid, a NESTS operative who activates an army of Kyo clones using stolen data. He fights in a data‑analyzing coat, which later burns away to reveal a stronger form. After his defeat, a superior crushes him with falling debris while NESTS assaults K' and Maxima—revealed as former NESTS agents—who survive, defeat their foes, and escape the collapsing arena. K' is disclosed to be a test subject engineered to mimic Kyo’s fighting style.