That’s it. You now have KOF '97 on your PC for free, with GGPO rollback netcode—meaning you can play against people in Japan or Brazil with near-zero lag.

If you eventually want to support SNK, drop $15 on on Steam. Why buy what you can get free?

The gold standard for Neo-Geo games (the arcade board KOF 97 ran on) is or FinalBurn Alpha (FBA) .

Once you have the game running, go straight to "Team Edit" mode. Pick Iori, Leona, and Yamazaki. Hold Start when selecting them. You’ve just unlocked the "Orochi" versions. Good luck surviving your own power.

If you just want to play single-player or with a friend on the same keyboard, use a traditional emulator.