hey, let's say i work for this game dev team in another country . . . and i want to start a branch of that team in here, how do i go about doing it?

Here's a better question: How did you start the first company?

It's about like that, I'd say. A branch is, bluntly, an offshoot of another company, and it should function as such. Of course, management overseas (or not) will work differently due to changes in government and economic policies, but I'd assume it'd be more-or-less like working with a team long-range.

But these are all my views on how a company branch should work, I have NO experience in the business field. So disregard this if you please. Just a thought.

if you go to www.rba.co.uk/sources/country.htm#uk this will give you links to organisations that could possibly help you.