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You need to find various Riddler trophies and interview tapes hidden throughout the entire game. Plus, if you find all of the trophies, interview tapes, and all of the Riddler's challenges you unlock an achievement (I'm guessing there is a trophy on PS3 that's the same). Games Radar has an amazing Riddler challenge walkthrough.
http://www.gamesradar.com/f/batman-arkham-asylum-riddler-guide/a-2009082614217603032
I suggest beating the game first, however, before doing the Riddler's challenges.
What else can I help you with?
How long is Batman arkham asylum?
About 6 - 8 hours of gameplay.It has replay value though because there are tons of stuff to unlock through out the game.
How do you unlock bonus costumes in batman arkham asylum?
The only alternate suit I have seen is the Armored version, unlockable after beating the games story mode. Sadly, it is only for Challenge mode.
How do you get to Mr freeze is in batman arkham city?
you dont unlock him but you do help him in the middle of the game
What happens if you get all riddler trohpies in batman arkham city?
You unlock the Riddlers' hideout.
How do you unlock the skins in Batman Arkham city ps3?
You'll have to buy the costume pack in the ps3 store.
Batman arkham asylum cheat to unlock joker?
PS3 exclusive my friend, sorry..
What do you do yo unlock joker in batman arkham asylum?
you download it off the ps3. cant get it it for xbox. "yet"
How do you get to fireworks in batman arkham asylum?
To access the fireworks in Batman: Arkham Asylum, you need to locate and solve the Riddler's challenges scattered throughout the game. Once you complete certain challenges, the fireworks will be triggered as part of the game's celebration sequence. Keep an eye out for Riddler trophies, riddles, and puzzles to unlock this Easter egg.
How do you unlock the joker in batman arkham asylum?
It is only available for PlayStation 3. Go to the PlayStation store and download the add ons.
How Do you download the joker on batman arkham asylum ps3?
you have to go to psn (play station networks) and download it. remember, you can only unlock him on the ps3.
How long is Batman arkham asylum?
About 6 - 8 hours of gameplay.It has replay value though because there are tons of stuff to unlock through out the game.
How do unlock all the Joker chalenges in batman arkham asylum after you download him.I went to the challenges but only one is available.Do you have to play each one to unlock more?
no you need to play the story mode and as you go past levels you will unchlock more joker challenge maps
How do you unlock bonus costumes in batman arkham asylum?
The only alternate suit I have seen is the Armored version, unlockable after beating the games story mode. Sadly, it is only for Challenge mode.
Can you be the joker in Batman arkam asylum?
In Batman Arkham Asylum on ps3 you can actually be the joker! You must unlock the mission in which you can be joker and play it in the Challenge Mode. You have to progress through the game to unlock the mission and finish some riddler missions. If you are logged in you may be able to succesfully do challenge Missions, Sometimes you have to download to the latest ps3 version, and you may also do other Challenge Missions in the Challenge Mode.
In Lego batman Wii how do you get to arkham asylum from the batcave's mission room once you unlock it?
You need to take the elevator like thing up i think and go to the orange mat and you should see a lever where you see clayface and riddler. pull the lever and it takes you to the Arkham side
How do you get to Mr freeze is in batman arkham city?
you dont unlock him but you do help him in the middle of the game
What happens if you get all riddler trohpies in batman arkham city?
You unlock the Riddlers' hideout.
