Here is the full list of all 18 Karate Master 2 Knock Down Blow achievements.
You need to earn 1500 bucks.
Win the Kumite tournament.
Requires tai kitae 10
Requires speed 10
Requires KI 10
Requires toughness 10
Requires strength 10
Defeat the legendary Sensei Matsu.
Reach fame 100.
Win a Karate-Pro tournament.
Jump over a car.
Win a ring event.
Win a Full Contact Karate tournament.
Win a Bogu Kumite Tournament.
Heal yourself in the hospital.
Defeat the bull.
Defeat the bear.
Defeat Oboro.