I'm at the part where you have to go to Blackgate prison because Joker started a riot, there's a section where you have to press "A" (Xbox controls) to activate a button that turns on electricity for you to send your batarang through and hit a control panel. I've looked at walkthroughs and there is a prompt to press "A" in front of a big button but that prompt doesn't come up for me, effectively making progress impossible and the whole game broken.I've reloaded and shut the game down multiple times... Has anyone else had this or heard of it?

Reminds me of when I ran into Costume Quest's game breaking bug, something to do with a banana I think?

This?

I also recall getting stuck at a point and hadn't realised there was a zipline above.

@flstyle: Yep, except "press A to use" isn't coming up.