Hi, just started playing for the first time last night and i think i've stuffed up already!
As i'm not really interested in the main story until i can gain some experience i decided to check out the side missions. One of which involves locating 6 crates in a joint venture with Bain (thankfully as he is huge!). Problem is i stumbled into what i thought was a loction for a crate and it turned out to be where the Joker was based so i ended up defending myself against Mister Hammer etc etc..... long story short i completed that part of the main quest and now i cant get back into that building to grab that crate.
Any ideas or do i have to start over?