If the game is released in June, pre-ordering is the worst thing you can do from an economic perspective: You lose the interest your bank would give you, and thanks to inflation the game will actually be *cheaper* in June, because the price has already been fixed and they can hardly increase it again. Also, Unigine may lower the price until June or have some kind of promotion (e.g. you get a multi-platform-license for the same price if you buy on a specific date).