# Counter-Strike Betas (From Beta 1.0 to Beta 6.2)
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The earliest versions of Counter-Strike use an older version of the Half-Life SDK (as known as HLSDK 1.X) that are incompatible with the current releases of Half-Life, and thus require an older release of the game in order to play them.
The earliest versions of Counter-Strike use an older version of the Half-Life SDK (as known as HLSDK 1.X) that are incompatible with the current releases of Half-Life, and thus require an older release of the game in order to play them.
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**Currently, we do not host any Counter-Strike beta server**. This post here is only for preservation purposes.