It looks like Left 4 Dead started out as a Counter-Strike: Condition Zero mod, and you can now try it yourself. Counter-Strike 1.6’s latest update inadvertently included Valve’s earliest prototype of ...
A new Counter-Strike update contains an extremely early prototype of zombie co-op shooter Left 4 Dead. To celebrate the 25th anniversary of Half-Life, Valve has released a variety of new material for ...
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