Batman: Return to Arkham - Arkham City
70 Achievements
1,500
80-100h
Conundrum
Rescue the first hostage from Riddler
20
19.11%
How to unlock the Conundrum achievement in Batman: Return to Arkham - Arkham City - Definitive Guide
VirusTk GaMBit
TrueAchievements
TrueAchievements
Make your way to said location and inspect the wall with the huge green question mark. Inside you'll have to solve a pretty easy riddle involving some batarangs to discharge the floor panels. Always go from one safe haven to another. As soon as you reached one of the panels that aren't charged look for the next question mark to aim at. Continue to do so untill you have reached the elevator. aim at the last question mark to lift the elevator upwards.
Alternatively, you could just wait until you have the line luncher to just skip the whole playing ground
As soon as you'll untie the hostage, the achievement unlocks!
Hope this helps you guys!
Any improvements? Please let me know in the comments below !
BeforeJam, and, Combatting, olsen77
The first hostage will be marked on your map once you complete IQ Test, it’ll be south once you leave the church. There will be a wall marked with a green question mark. Curiously, you can’t blow it up with explosives, instead you must walk up to it and press 
. Batman will then break it down with bare fists, and you can enter this building.
Here, you must rescue a hostage using your gadgets. Once you enter, turn around and use your batarang to hit a question mark switch above the front door you came in. Enter the next room. This puzzle requires you to use the batarang to hit question mark switches, which will shut off electrocuting tiles that you’ll have to walk across.
Throw a batarang to the switch ahead of you, then run across the tiles it shuts off. The next switch is to your right after you sprint across the first tile set. Throw a batarang at the first switch again, which will activate the last set of tiles to an elevator. The final switch is to the left of the door you entered from, which will activate the elevator. Glide to the hostage to rescue them.
After the puzzle, you will receive the Enigma Machine, which will point you to your next hostage using the cryptographic sequence, which will become available once you solve 80 riddles (Mastermind). See Genius for the Riddler Challenges guide.
