my question is pretty simple: if I buy a game overseas, the VAT tax revenue (dependent on the % set etc) should go to the country's state in which I buy the game from. Is this the case?
Typically VAT is only applied within the county you are in, and only goes to the country you are in (though as a part of the eurozone it's likely a percentage of it will go towards eurozone taxes of course).
For a more defined answer, you'd actually have to contact your revenue service and go through whetever layers of mind numbing beuracracy (i know that isnt at all spelled correctly!) they have.
Hope that helps though!
Edit: and preety much ninja'd by Fezred i think on that