K-1 Grand Prix, known in Japan as Fighting Illusion: K-1 Grand Prix '98, is a video game based on the K-1 martial arts organization in Hong Kong and the K-1 World Grand Prix, developed by Daft and published by Xing Entertainment in Japan in 1998, and by Jaleco and Eon Digital Entertainment in 2000, both for PlayStation.
It is the sixth game in the K-1 Fighting series.
The game received mixed reviews according to the review aggregation website GameRankings.
[1] In Japan, Famitsu gave it a score of 27 out of 40.
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