As you know, Left 4 Dead, the most iconic online zombie game in the world, was made with the Source game engine, as in every Valve game. Before making a game on the Source engine, the first thing external developers who work with Valve do is test their game ideas on an old game made on the Source engine.
Left 4 Dead developer Turtle Rock Studios used Counter-Strike’s penultimate game, CS: Source, to test the prototype of this legendary game. But the main thing is that this prototype stage was leaked.
What’s more, Left 4 Dead’s prototype phase is available for download as a CS: Source mod
We see that Turtle Rock is testing Left 4 Dead’s prototype on Counter-Strike: Source. On the map named ‘Zombie City’, we start on the Terrorist side and make purchases as in the normal game.
However, what you need to do to win on the Zombie City map is not to set up/defrost a bomb or kidnap/protect the hostage, all you have to do is go to the other end of the map without dying. Of course, this is not as easy as you think because you will see Counter Terrorists with dozens of blades running towards you. How similar to Left 4 Dead, right?
Turtle Rock studio managed to get the investment from Gabe Newell thanks to this prototype, and we came across the most perfect online zombie killing game in history. Unfortunately, Valve recently announced that they are not developing Left 4 Dead 3, but there is hope to live…
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