This achievement needs a minimum of seven players: The person who gets the achievement HAS to be Batman, everyone else will be a Bane or Joker thug.

To make this easier, everyone who will be playing a thug must go to the game options and set Hero Opt-Out to "Yes", while the person who wants to get the Achievement must set it to "No". That way he'll be the one that gets Batman. The game likes to glitch out and sometimes assigns Batman to a random player, if that happens just exit the game, start another lobby, and try again.

You need to go to the Wonder City Robot Factory map, the center point has six locations where you can knock out thugs very quickly.

It is VERY IMPORTANT that once someone is knocked out, HE STAYS OUT OF THE CENTER POINT. This is so he doesn't get killed again by accident and the match ends early.


There are four spots in particular that are useful. My character (who looks like Jamie from Mythbusters ... for some reason) will show you these places.

One: A thug should stand here so Batman can do an inverted takedown.

Two: Batman can do a ledge takedown from here.

Three: Batman can do a grate takedown from here.

Four: The thug should stand there, and Batman should kneel behind him, then Snap to Cover. From there, he can do a corner takedown.

Five: Get a thug with Explosive Gel.

Six: Get a thug with a Silent Takedown.

Other possible takedowns include:
Run, slide to knockdown, then do a ground knockdown;
Explosive Batarang

After six different takedowns, the achievement will pop.

Once you get the achievement, spray some explosive gel on the floor and ask four people to walk up to it. Blow it up, and you'll get the achievement. Easy Peasy.

And bonus 2: You'll also get Know Thy Enemy for your trouble!

Thanks to Trip Fisk for teaching me how to do this. I realize it's late, but hopefully someone will be able to use this to get the achievement.

In Conclusion, here's Batman eating a bazooka.