Places to visit in Hamburg

Hello everybody,

I'm writing this in english, because my written german is not as good as it has been.

I'm going to Hamburg in mid september, and I'm looking for arcade/retro gaming shops and arcades to visit. I'm staying in the center of Hamburg.

Anyone who knows any good places?

PS. You can write in german - I have no problem reading it

I'm also interested in visiting any shops selling retro consoles and simmilar things - if anyone has any knowledge about such a place.

yeah - I saw that thing in oktober - but sadly I'm going in the middle of september :-/