They can't; Mihn Le (the guy that made the series) owns the rights to it.I'd still trust the wizards at VALVe to make a new counterstrike game. I never really even played counterstrike or CS:S but I'm severely lacking in the competitive FPS department these days. Developers don't want to make that kind of game apparently because they are more interested in quick money over the longevity of their product.
