Batman: Return to Arkham - Arkham City

Complete all the Riddler Combat challenges for Catwoman, and collect all the CW riddler trophies. if you interrogate all known riddler associates as Batman all Trophies for both BM and CW will be shown on the map as well as all breakable objects.

To get this achievement you must acquire 35 the Catwoman Trophies that appear 5 for each of the Zones, except for Wonder City, and 5 Combat Challenges, combining to a total of 40 grid items.

After saving the first Hostage from The Riddler you will be able to Interrogate Green tinted enemies as batman after defeating the rest of the enemies in an encounter by pressing . Interrogating enemies will reveal the location of a few of the Riddler trophies on the map, these can also be Catwoman Trophies. Here is a link to a great text/picture guide by GamesRadar that can help with figuring out exactly where the trophies are if you can't be bothered, or are unsure where exactly they are: https://www.gamesradar.com/batman-arkham-city-riddler-guide/

As for the Combat Challenges: I have to give credit to "Batman Arkham Videos" on youtube who has a great video on the 5 Combat Challenges that I used to complete them. A great location that I found to do them was the courthouse. I hadn't defeated the pack of 15 or so enemies that were inside, if you have, they may not be there for you. If so, you will have to just travel the open world to find a group of enemies to do the combo challenge on.