This achievement is rather easy and can be obtained in any combat map available.
It is recommended to do this on the first map, since it is the easiest in the game.
You ARE ALLOWED to lose your combo during the fight. Only thing that musn't happen is a hit that gets through to you. As soon as you get hurt, you have to start over.
Just use "counter" as much as possible by pressing
at the right time and/or use the jumping system to dodge all enemies by double-tapping
Down below you can orientate yourself to a video. In the video you can see how Batman loses his combo and the achievement still unlocks at the end of the match.
(video credit: MrBlingBlingNr1)
Hope this helps!
Any improvements ? Please let me know in the comments below!