Similar to the achievement in Arkham Asylum you have to survuve all 4 waves without being hit. You don't have to uphold a combo though. So don't worry if you miss a punch or two. Obviously, the easiest map would be the one in the courthouse. Just keep jumping over the enemies after you dealt damage and you should be good.
(video credit: PS4Trophies)
Hope this helps you guys!
Any improvements? Please let me know in the comments below!