This used to be pretty tough on the original game, but with all the DLC costumes in this Definition Edition, it's a breeze.
To prepare:
1. Find two melee upgrade statues, and unlock the Leg Breaker skill. This would be the second skill on the lower branch of the skill tree. To use this skill, press
to grapple, and then
,
Hold. This skill renders most enemies (except the big guys and the weapon guys) totally defenseless, and allows you to go behind to press
,
to do an immediate kill.
2. Buy the Bronze Statue costume from the yellow clothing store in the Night Market. This costume reduces damage taken by 60%.
3. Before engaging the fights, drink a Herbal Tea, which reduces damage taken by 50% - together with the costume, you're now pretty much invulnerable to attacks.
4. Eat any food, just in case, for health regeneration.
5. Drink something from your fridge to increase melee damage.
6. Now just head to all four martial arts club icon on the map, and finish the fights.
The club in
Central is a bit tricky to get to. You'll see it behind a stretch of seemingly endless shops. To get to it, head west (use the direction on the map's compass, and go west) from the street until you see a set of grey double doors. You can go into this door, go up the stairs, and find the club at the end.
The club in North Point is also rather tricky - it's not where you learn new combat skills. Instead, it's just beside it, surrounded by some fence, and you should see a guy there with a yellow speech bubble.
When fighting, go all out with Leg Breaker, and the
,
follow-up. Remove one enemy at a time, then go for the big guys/ weapon guys with heavy attacks. Use
to counter if necessary.
The achievement will unlock upon completing the final club fight.