Counter Strike Condition Zero

CS this was a hit what that time,its a great game and the developers made a single campaign for this game.It was very hard to complete the story but many fans complete this game.As I know it was an addon for CS 1.6, I never played CS 1,6 but my friends like this game.I think that developers must made a new single campaign for CS Source or CS GO.If you dont ever played CS Condition Zero do it.