The Roadblock

In the second mission, you are now timed from the time you are first detected. 

Stage 1:
You have 4 opponents in this stage with a one minute time limit.
I recommend taking out at least the first bad guy using stealth or you may have a hard time with this one.  If you watch the guard closest to him, when they are both turned away, use stealth and you have a good chance and getting both of them if you are quick to start off.

Stage 2:
Has a 45 second time limit for 3 bad guys.
You should take out at least the first one using stealth.  Watch the second guard again and when both have their backs to you use stealth on them both.

After that stage there is no more time limits.

Stage 3:
You have 3 guards one armed so take him out first with a grapple move. I could not use stealth here but it was not needed.

Stage 4:
3 last guards to finish off just to get to the roof top and enter the market place.  Quite a simple task.

On this mission you can add the following items to your inventory:
Health - 7
Ammunition - 1
Tonfas - 1