I replayed this game and encounter this bug that it stop you from progress if you have remap your keys ...and there will be a point where you will fight some thugs which you will can beat but a big one will come and you can fight for minutes even hours and he wont be defeated but once i changed my keys to default by reset you will see in the video how easy i've beat him.

I don't remember have this bug when i first played it but as i just discovered it ..i decide to make this guide to be a little bit more easy for people who just start this game to defeat that big dude.