I know what you mean regin2005.
No splitscreen can will limit this games sales potential. But all games have flaws or things that can be improved.
Half-Life didn't have any multiplayer and it's still one of the top selling FPS ever. Would it kick a** if it did have multiplayer? You betcha. But not having it just means that it better have other qualities that are highly valued and where no better alternatives are available. It does great realistic graphics and fully customisable controls.







