Counter-Strike: Condition Zero Q&A - GameSpot

What's the status of the single-player version of Counter-Strike? Find out in this interview with Valve Software.
Condition Zero's release is overshadowed by no fewer than three new technologically advanced, highly anticipated shooters, which all cast a harsh light on what is essentially a 6-year-old game--albeit a classic one.

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Revisiting the Classic: Counter-Strike 1.1 : r/pcmasterrace

Counter-Strike: Condition Zero Review - GameSpot

Counter-Strike: Source Box Shot for PC - GameFAQs

Counter-Strike: Condition Zero Walkthrough - GameSpot

Counter-Strike: Condition Zero Walkthrough - GameSpot

Revisiting the Classic: Counter-Strike 1.1 : r/pcmasterrace

Counter-Strike: Condition Zero (2004) - MobyGames

Counter-Strike: Condition Zero Walkthrough - GameSpot

Counter-Strike: Condition Zero Walkthrough - GameSpot

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Counter-Strike: Condition Zero Walkthrough - GameSpot

Counter-Strike Xbox Edition, Counter-Strike Wiki