I think you can do them after, but there is no point. After the game is over, you can still play but there are no more families to fight. Not to mention you will need the guns to fight the families.

But can I travel to any city I want after I have left it?

Yes. When you move from city to the other, after a couple of missions, you can go back and forth as you want

Thank you so much ^^I'll go back and continue now :)

When I am going to promote my guy to Capo, it says that I should press R2...I do that and nothing happen! What shall I do?

I just had to turn it off and on again, and it worked! Strange...but, oh well :P

I am at 17% at the trophies now, so I have gotten a start! I have been playing all night, and now I will get 4 hours of sleep before I'll have to wake up again! Yay xD

I really liked it too. Its an easy plat, but it's a good game IMO.

I am at 21% now! :)
Still having a good time with it!

@Kylie

I thought i was gonna quit, then i got the advice that was 'if you aren't hated you aren't trying hard enough'. So i stayed.

I'll have shame in creating if 30 people were on my accounts but i'm one guy, doing what a bunch of others do. It's unfair on me if the others cheat, so i even the playing field. If they didn't cheat, i wouldn't.

No one here cheats.
Got GF2 today:)