im not 100% where you are but im guessing its either up a step ladder or through a door, unlike the old ones doors that look like they are shut and cant be walked through can be walked into in this one and they might open up....
as for the darkness, i found this on the ps3 version and on the ps3's setting (in the cross bar menu) under display there is a super white option make sure this is off and it brightens up alot.
If its 360 then i found it a little dark but searching your tv model number on a AV site can normaly bring up some good advice on what settings to use as my TV was dark with GTA but now its properly set up i hardly ever get a point where I cant see enough. (sometimes at night down dark alleys but thats about it.
I will provide some links if you give me your tv model number.
Nice one baby
LG
RZ 26l 750
