You dont know where can you buy a game???
On a gaming shop, of course, where else?
The game is only in Russian but here in Greece there is a big gaming shop that you can order evry game you like and then they bring it to you even if it not released in Greece yet. So when i learnt about the release of Collapse i told them and then they bought it directly from Russia and gave it to me!
But this shop is only for greek people so i am afraid you have to wait for the english version... Or if there is a similar shop to your country you can order it and then buy it! Anyway did you download the demo?