You cannot access the barrel in the Steel Mill until your second visit there in the main story line, the one in the museum is when you locate Mr Freeze, when you move down into the subway for the 1st time to destroy the final signal jammer there is one there, and the other one in the restricted area is not accessible until you enter the subway for the 2nd time and is found in the predator room where one of the goons has a remote signal jammer.

As for locating them, two are readily accessible at any point and the other 4 will only be accessible as you progress through the main story line.

Once you have this side mission the barrels will be easily seen as you near them in detective mode as they will emit a red pulsing signal. You will now be required to find and destroy 6 TITAN barrels, I would recommend tracking them down as you play through the main story but if you prefer you can mop them up at the end of the game. You will get a cut scene and the following: This will lead you to a final location and symbol which you should head to and scan. Use the left and right stick to move the symbols, make sure you zoom the symbols out to fit over all the points. After scanning all four symbols, your map will pop up, and you must solve the puzzle by moving the symbol to place the flashing small circles in line with the locations where you met him on the map.

and try coming back.Īfter speaking to the chap he will leave a symbol on the ground, requiring you to enter detective mode to scan it. Don't panic just continue with side missions or doing Riddler trophies etc. If he doesn't appear immediately save it and reload, and sometimes if you are really unlucky he will be stubborn and not show. You cannot locate him at point 4 until after you rescue a Vicky Vale. You cannot locate him at point 3 until after you interrogate Mayor Quincy Sharpe. You cannot locate him at point 2 until after leaving the Steel Mill for the 1st time. Credit goes to Iv ARK ANGEL vI for the map.

Batman arkham city riddler challenge