Batman Arkham Asylum trophies
Trophies known to be available so far, at the end of the trophy list there are 16 items listed as "secret'
Big Bang
Complete story mode on Easy difficulty
Bigger Bang
Complete story mode on Normal difficulty
Biggest Bang
Complete story mode on Hard difficulty
Party Pooper
KO all the henchmen celebrating your arrival at the party
Freeflow Combo 20
Complete a combo of 20 moves (any play mode)
Freeflow Combo 40
Complete a combo of 40 moves (any play mode)
Night Glider
Glide continuously for over 100m
Rope-a-dope-a-dope
String up one henchman and drop him to surprise a second (any play mode)
Mano-A-Mano
Defeat Titan henchman without using Batarangs (any play mode)
Catch!
Catch a Baterang (any play mode)
Freeflow Combo 5
Complete a combo of 5 moves (any play mode)
Freeflow Combo 10
Complete a combo of 10 moves (any play mode)
Freeflow Perfection
Perform a perfect combo including all of Batman’s combat moves (any play mode)
Freakshow Rodeo
Ride Titan henchman a knock down 10 thugs (any play mode)
Freeflow Bronze
Achieve 8 medals on combat challenges
Freeflow Silver
Achieve 16 medals on combat challenges
Freeflow Gold
Achieve 24 medals on combat challenges
Predator Bronze
Achieve 8 medals on predator challenges
Predator Silver
Achieve 16 medals on predator challenges
Predator Gold
Achieve 24 medals on predator challenges
Invisible Predator
Complete one predator challenge by using only Silent Takedowns
Flawless Freeflow Fighter
Complete one combat challenge without taking damage
Crack The E Nigma
Solve every riddle on the island
Arkham Analyst
Solve 5% of riddler challenges
Cryptic Investigator
Solve 10% of riddler challenges
Lateral Thinker
Solve 25% of riddler challenges
Mystery Solver
Solve 40% of riddler challenges
Conundrum Cracker
Solve 55% of riddler challenges
Mental Athlete
Solve 70% of riddler challenges
Riddle Resolver
Solve 85% of Riddler challenges
World’s Greatest Detective
Spirit of Amadeus Arkham revealed
Perfect Knight
100% Complete
Source: http://www.allps3trophies.com/retail-games/batman-arkham-asylum-trophies.html