KOF '99 Plus Rom is an unofficial arcade hack of The King of Fighters '99: Millennium Battle
“Finally, KOF shows itself RIGHT on the psx! ... The game runs smooth and fast and plays very well.” GameFAQs · 24 years ago Kof 99 Plus Rom
Unlocked Bosses & Secret Characters: Versions like the Anniversary Edition often make the final boss Krizalid (both forms) immediately selectable . KOF '99 Plus Rom is an unofficial arcade
You will need the parent ROM (kof99.zip) and the Plus child ROM in the same directory if using MAME. Kof 99 Plus Rom
Most "Plus" iterations of this ROM focus on removing the barriers found in the arcade original.