Question about steam version

So, i bought the rust game from normal website. there isnt a browser version anymore, so how do i play it on steam?

Do i have to buy a wholle new game?

(User was banned for this post ("didn't read the sticky" - postal))

you can probably get a steam key code for it, not sure how though.


But how do i get that steam key…

[editline]22nd December 2013[/editline]

Nevermind, i figured it out.