If you can not be reproduced in the Source engine, made from a pair of 0 if? In Japan, I want this game, HL2 (Source SDK Base OrangeBox) to get their money, and lots of people. Japan would probably not alone. I make all original, Source would take the time and cost in the form if you do not use the engine, it can also receive requests for them. It is difficult to be different degrees of freedom might be higher?