I'm looking for some insight on how to complete this challenge. The challenge reads, "Use the Quickfire Remote Electrical Charge during a combo [5 Required].

I have tried both laying and detonating the charges while in a combo without any luck. It is the only Riddler challenge I have left to complete. Am I overlooking something obvious?

You're supposed to use the REC, the handheld gun that shoots lightning balls.

Also, are the physical challenges required to get the last riddler room?

Press L1 + O to quickfire the REC. Do it 5 times in one combo, I guess you won't be able to fire all 5 in one go, you will have to seperate it with punches to keep the combo going.

@Kavik2011 said:

I'm looking for some insight on how to complete this challenge. The challenge reads, "Use the Quickfire Remote Electrical Charge during a combo [5 Required].

I have tried both laying and detonating the charges while in a combo without any luck. It is the only Riddler challenge I have left to complete. Am I overlooking something obvious?

Like others have said, sounds like you're putting down explosive gel. The REC is the gadget that's on the first right of the D-Pad, and the quickfire is L1+O (or LB+B on the Xbox, I'd guess).

Awesome, Thanks a ton!

I'm having issues with the one where you have to quickfire three gadgets during one combat encounter. I've done exactly that, but the challenge won't unlock.

The physical challenges are not required to unlock the final riddler room, you just have to find enough trophies and solve enough riddles.

@ADAMWD said:

I'm having issues with the one where you have to quickfire three gadgets during one combat encounter. I've done exactly that, but the challenge won't unlock.

Are you sure it isn't during one combo? Meaning you can't loose your combo while doing it.

All you need to do is use the Quickfire REC atleast once in a combo. Not all 5 in one combo. So you can get say a 4X combo and then shoot one to make it 5X but then end the combo. It just wants you to do 5 combos that include the Quickfire REC shot