In order to earn this trophy
you must complete all 243 of the Riddler's riddles.This is a combination of destroying area specific objects, scanning riddles and collecting the green trophies scattered around Gotham.
It is highly recommended that you complete the main storyline before attempting to complete this as many riddles require specific gadgets such as voice synthesizer, ice grenade, electric gun, etc.
There are 7 locations for the trophies:
Bleake Island
Founders Island
Miagami Island
Arkham Knight HQ
Stagg Airships
Panessa Studios
Subway Station Under ConstructionTo make all locations easier to find, fly around Gotham in detective mode and search for glowing green thugs as well as glowing green vehicles. Knock out any enemies around them, without knocking out the green thug and then interrogate him. Occasionally they will fight back requiring you to counter them. If you fail to counter them you lose the opportunity to interrogate and must find a new Riddler informant.
Here is all the collectibles for Bleake IslandHere are all the collectibles for Miagani Islandhttps://www.youtube.com/watch?t=2&v=m2k2am99VG8Here are all the collectibles for Founders IslandHere are all the trophies, collectibles and breakable objects for Arkham Knight HQHere are all the trophies, collectibles and breakable objects for Stagg AirshipHere are all the trophies, collectibles and breakable objects for Panessa StudiosVideo credits go to PowerPyx and NukemDukem
https://www.youtube.com/user/PowerPyxhttps://www.youtube.com/channel/UC9s0ZYxkI90hP3ADETrHxgg