Pride 28: High Octane was a mixed martial arts event held by the Pride Fighting Championships. It took place at the Saitama Super Arena in Saitama, Japan on October 31, 2004.
- Herring defeated Yokoi via KO (knees) at 1:55 of round 1.
- Choi defeated Palalei via submission (rear-naked choke) at 4:55 of round 2.
- Arona defeated Ignatov via submission (rear-naked choke) at 9:05 of round 1.
- Emelianenko defeated Thompson via KO (punch) at 0:11 of round 1.
- Overeem defeated Kanehara via TKO (doctor stoppage) at 3:52 of round 2.
- Hunt defeated Bobish via TKO (kick to the body) at 6:23 of round 1.
- Henderson defeated Nakamura via TKO (shoulder injury) at 1:15 of round 1.
- Filipovic defeated Barnett via submission (shoulder injury) at 0:46 of round 1.
- Silva defeated Jackson via KO (knees) at 3:26 of round 2 to retain the Pride Middleweight Championship.